diff --git a/contrib/android/make_apk.sh b/contrib/android/make_apk.sh
index 05c93729b..d20289568 100755
--- a/contrib/android/make_apk.sh
+++ b/contrib/android/make_apk.sh
@@ -15,7 +15,7 @@ LOCALE="$PROJECT_ROOT"/electrum/locale/
 export ELEC_APK_GUI=$1
 
 if [ ! -d "$PACKAGES" ]; then
-  "$CONTRIB"/make_packages.sh || fail "make_packages failed"
+    "$CONTRIB"/make_packages.sh || fail "make_packages failed"
 fi
 
 pushd "$PROJECT_ROOT"
diff --git a/contrib/build-linux/appimage/make_appimage.sh b/contrib/build-linux/appimage/make_appimage.sh
index 0fcc5329d..e5fd22d5b 100755
--- a/contrib/build-linux/appimage/make_appimage.sh
+++ b/contrib/build-linux/appimage/make_appimage.sh
@@ -18,8 +18,7 @@ PYTHON_VERSION=3.9.11
 PY_VER_MAJOR="3.9"  # as it appears in fs paths
 PKG2APPIMAGE_COMMIT="a9c85b7e61a3a883f4a35c41c5decb5af88b6b5d"
 
-
-VERSION=`git describe --tags --dirty --always`
+VERSION=$(git describe --tags --dirty --always)
 APPIMAGE="$DISTDIR/electrum-$VERSION-x86_64.AppImage"
 
 . "$CONTRIB"/build_tools_util.sh
@@ -52,11 +51,11 @@ tar xf "$CACHEDIR/Python-$PYTHON_VERSION.tar.xz" -C "$BUILDDIR"
     # Patch taken from Ubuntu http://archive.ubuntu.com/ubuntu/pool/main/p/python3.9/python3.9_3.9.5-3~21.04.debian.tar.xz
     patch -p1 < "$CONTRIB_APPIMAGE/patches/python-3.9-reproducible-buildinfo.diff"
     ./configure \
-      --cache-file="$CACHEDIR/python.config.cache" \
-      --prefix="$APPDIR/usr" \
-      --enable-ipv6 \
-      --enable-shared \
-      -q
+        --cache-file="$CACHEDIR/python.config.cache" \
+        --prefix="$APPDIR/usr" \
+        --enable-ipv6 \
+        --enable-shared \
+        -q
     make -j4 -s || fail "Could not build Python"
     make -s install > /dev/null || fail "Could not install Python"
     # When building in docker on macOS, python builds with .exe extension because the
@@ -73,10 +72,10 @@ cp -f "$PROJECT_ROOT/electrum/libsecp256k1.so.0" "$APPDIR/usr/lib/libsecp256k1.s
 
 
 appdir_python() {
-  env \
-    PYTHONNOUSERSITE=1 \
-    LD_LIBRARY_PATH="$APPDIR/usr/lib:$APPDIR/usr/lib/x86_64-linux-gnu${LD_LIBRARY_PATH+:$LD_LIBRARY_PATH}" \
-    "$APPDIR/usr/bin/python${PY_VER_MAJOR}" "$@"
+    env \
+        PYTHONNOUSERSITE=1 \
+        LD_LIBRARY_PATH="$APPDIR/usr/lib:$APPDIR/usr/lib/x86_64-linux-gnu${LD_LIBRARY_PATH+:$LD_LIBRARY_PATH}" \
+        "$APPDIR/usr/bin/python${PY_VER_MAJOR}" "$@"
 }
 
 python='appdir_python'
@@ -173,17 +172,17 @@ info "stripping binaries from debug symbols."
 # "-R .comment" also strips the GCC version information
 strip_binaries()
 {
-  chmod u+w -R "$APPDIR"
-  {
-    printf '%s\0' "$APPDIR/usr/bin/python${PY_VER_MAJOR}"
-    find "$APPDIR" -type f -regex '.*\.so\(\.[0-9.]+\)?$' -print0
-  } | xargs -0 --no-run-if-empty --verbose strip -R .note.gnu.build-id -R .comment
+    chmod u+w -R "$APPDIR"
+    {
+        printf '%s\0' "$APPDIR/usr/bin/python${PY_VER_MAJOR}"
+        find "$APPDIR" -type f -regex '.*\.so\(\.[0-9.]+\)?$' -print0
+    } | xargs -0 --no-run-if-empty --verbose strip -R .note.gnu.build-id -R .comment
 }
 strip_binaries
 
 remove_emptydirs()
 {
-  find "$APPDIR" -type d -empty -print0 | xargs -0 --no-run-if-empty rmdir -vp --ignore-fail-on-non-empty
+    find "$APPDIR" -type d -empty -print0 | xargs -0 --no-run-if-empty rmdir -vp --ignore-fail-on-non-empty
 }
 remove_emptydirs
 
@@ -200,8 +199,8 @@ rm -rf "$PYDIR"/site-packages/Cryptodome/SelfTest
 rm -rf "$PYDIR"/site-packages/{psutil,qrcode,websocket}/tests
 # rm lots of unused parts of Qt/PyQt. (assuming PyQt 5.15.3+ layout)
 for component in connectivity declarative help location multimedia quickcontrols2 serialport webengine websockets xmlpatterns ; do
-  rm -rf "$PYDIR"/site-packages/PyQt5/Qt5/translations/qt${component}_*
-  rm -rf "$PYDIR"/site-packages/PyQt5/Qt5/resources/qt${component}_*
+    rm -rf "$PYDIR"/site-packages/PyQt5/Qt5/translations/qt${component}_*
+    rm -rf "$PYDIR"/site-packages/PyQt5/Qt5/resources/qt${component}_*
 done
 rm -rf "$PYDIR"/site-packages/PyQt5/Qt5/{qml,libexec}
 rm -rf "$PYDIR"/site-packages/PyQt5/{pyrcc*.so,pylupdate*.so,uic}
diff --git a/contrib/build-linux/sdist/make_sdist.sh b/contrib/build-linux/sdist/make_sdist.sh
index cae834575..20d4f5d50 100755
--- a/contrib/build-linux/sdist/make_sdist.sh
+++ b/contrib/build-linux/sdist/make_sdist.sh
@@ -21,7 +21,7 @@ python3 -m pip install --upgrade pip
 
 rm -rf "$PROJECT_ROOT/packages/"
 if ([ "$OMIT_UNCLEAN_FILES" != 1 ]); then
-  "$CONTRIB"/make_packages.sh || fail "make_packages failed"
+    "$CONTRIB"/make_packages.sh || fail "make_packages failed"
 fi
 
 git submodule update --init
@@ -48,9 +48,10 @@ fi
     find -exec touch -h -d '2000-11-11T11:11:11+00:00' {} +
 
     # note: .zip sdists would not be reproducible due to https://bugs.python.org/issue40963
-    if ([ "$OMIT_UNCLEAN_FILES" = 1 ])
-        then PY_DISTDIR="dist/_sourceonly" # The DISTDIR variable of this script is only used to find where the output is *finally* placed.
-        else PY_DISTDIR="dist"
+    if ([ "$OMIT_UNCLEAN_FILES" = 1 ]); then
+        PY_DISTDIR="dist/_sourceonly" # The DISTDIR variable of this script is only used to find where the output is *finally* placed.
+    else
+        PY_DISTDIR="dist"
     fi
     TZ=UTC faketime -f '2000-11-11 11:11:11' python3 setup.py --quiet sdist --format=gztar --dist-dir="$PY_DISTDIR"
     if ([ "$OMIT_UNCLEAN_FILES" = 1 ]); then
diff --git a/contrib/build-wine/build-electrum-git.sh b/contrib/build-wine/build-electrum-git.sh
index 6976c5a0e..d7ee10c91 100755
--- a/contrib/build-wine/build-electrum-git.sh
+++ b/contrib/build-wine/build-electrum-git.sh
@@ -12,7 +12,7 @@ set -e
 
 pushd $WINEPREFIX/drive_c/electrum
 
-VERSION=`git describe --tags --dirty --always`
+VERSION=$(git describe --tags --dirty --always)
 info "Last commit: $VERSION"
 
 # Load electrum-locale for this release
diff --git a/contrib/build-wine/sign.sh b/contrib/build-wine/sign.sh
index 19ecbe90a..7e4d723c4 100755
--- a/contrib/build-wine/sign.sh
+++ b/contrib/build-wine/sign.sh
@@ -29,14 +29,14 @@ echo "Found $(ls *.exe | wc -w) files to sign."
 for f in $(ls *.exe); do
     echo "Signing $f..."
     osslsigncode sign \
-      -pass $WIN_SIGNING_PASSWORD\
-      -h sha256 \
-      -certs "$CERT_FILE" \
-      -key "$KEY_FILE" \
-      -n "Electrum" \
-      -i "https://electrum.org/" \
-      -t "http://timestamp.digicert.com/" \
-      -in "$f" \
-      -out "../signed/$f"
+        -pass "$WIN_SIGNING_PASSWORD" \
+        -h sha256 \
+        -certs "$CERT_FILE" \
+        -key "$KEY_FILE" \
+        -n "Electrum" \
+        -i "https://electrum.org/" \
+        -t "http://timestamp.digicert.com/" \
+        -in "$f" \
+        -out "../signed/$f"
     ls ../signed/$f -lah
 done
diff --git a/contrib/build-wine/unsign.sh b/contrib/build-wine/unsign.sh
index 311e1008e..3beb30642 100755
--- a/contrib/build-wine/unsign.sh
+++ b/contrib/build-wine/unsign.sh
@@ -14,7 +14,7 @@ set -e
 mkdir -p signed >/dev/null 2>&1
 mkdir -p signed/stripped >/dev/null 2>&1
 
-version=`python3 -c "import electrum; print(electrum.version.ELECTRUM_VERSION)"`
+version=$(python3 -c "import electrum; print(electrum.version.ELECTRUM_VERSION)")
 
 echo "Found $(ls dist/*.exe | wc -w) files to verify."
 
diff --git a/contrib/build_tools_util.sh b/contrib/build_tools_util.sh
index 99dd30e73..6383dfa89 100755
--- a/contrib/build_tools_util.sh
+++ b/contrib/build_tools_util.sh
@@ -23,7 +23,7 @@ function warn {
 function verify_signature() {
     local file=$1 keyring=$2 out=
     if out=$(gpg --no-default-keyring --keyring "$keyring" --status-fd 1 --verify "$file" 2>/dev/null) &&
-       echo "$out" | grep -qs "^\[GNUPG:\] VALIDSIG "; then
+        echo "$out" | grep -qs "^\[GNUPG:\] VALIDSIG "; then
         return 0
     else
         echo "$out" >&2
@@ -52,23 +52,23 @@ function download_if_not_exist() {
 
 # https://github.com/travis-ci/travis-build/blob/master/lib/travis/build/templates/header.sh
 function retry() {
-  local result=0
-  local count=1
-  while [ $count -le 3 ]; do
-    [ $result -ne 0 ] && {
-      echo -e "\nThe command \"$@\" failed. Retrying, $count of 3.\n" >&2
+    local result=0
+    local count=1
+    while [ $count -le 3 ]; do
+        [ $result -ne 0 ] && {
+            echo -e "\nThe command \"$@\" failed. Retrying, $count of 3.\n" >&2
+        }
+        ! { "$@"; result=$?; }
+        [ $result -eq 0 ] && break
+        count=$(($count + 1))
+        sleep 1
+    done
+
+    [ $count -gt 3 ] && {
+        echo -e "\nThe command \"$@\" failed 3 times.\n" >&2
     }
-    ! { "$@"; result=$?; }
-    [ $result -eq 0 ] && break
-    count=$(($count + 1))
-    sleep 1
-  done
 
-  [ $count -gt 3 ] && {
-    echo -e "\nThe command \"$@\" failed 3 times.\n" >&2
-  }
-
-  return $result
+    return $result
 }
 
 function gcc_with_triplet()
diff --git a/contrib/deterministic-build/check_submodules.sh b/contrib/deterministic-build/check_submodules.sh
index c8df3a10b..7cf802f62 100755
--- a/contrib/deterministic-build/check_submodules.sh
+++ b/contrib/deterministic-build/check_submodules.sh
@@ -25,4 +25,4 @@ if [ $(date +%s -d "2 weeks ago") -gt $(get_git_mtime "contrib/deterministic-bui
     fail=1
 fi
 
-exit ${fail}
\ No newline at end of file
+exit ${fail}
diff --git a/contrib/freeze_containers_distro.sh b/contrib/freeze_containers_distro.sh
index 534f76231..0ef7adb30 100755
--- a/contrib/freeze_containers_distro.sh
+++ b/contrib/freeze_containers_distro.sh
@@ -5,23 +5,23 @@
 set -e
 
 DEBIAN_SNAPSHOT_BASE="https://snapshot.debian.org/archive/debian/"
-DEBIAN_APPIMAGE_DISTRO="buster" # should match build-linux/appimage Dockerfile base
-DEBIAN_WINE_DISTRO="bullseye" # should match build-wine Dockerfile base
+DEBIAN_APPIMAGE_DISTRO="buster"  # should match build-linux/appimage Dockerfile base
+DEBIAN_WINE_DISTRO="bullseye"    # should match build-wine Dockerfile base
 DEBIAN_ANDROID_DISTRO="bullseye" # should match android Dockerfile base
 
 contrib=$(dirname "$0")
 
 
 if [ ! -x /bin/wget ]; then
-  echo "no wget"
-  exit 1
+    echo "no wget"
+    exit 1
 fi
 
-DEBIAN_SNAPSHOT_LATEST=$(wget -O- ${DEBIAN_SNAPSHOT_BASE}$(date +"?year=%Y&month=%m") 2>/dev/null|grep "^<a href=\"20"|tail -1|sed -e 's#[^"]*"\(.\{17,17\}\).*#\1#')
+DEBIAN_SNAPSHOT_LATEST=$(wget -O- ${DEBIAN_SNAPSHOT_BASE}$(date +"?year=%Y&month=%m") 2>/dev/null | grep "^<a href=\"20" | tail -1 | sed -e 's#[^"]*"\(.\{17,17\}\).*#\1#')
 
 if [ "${DEBIAN_SNAPSHOT_LATEST}x" = "x" ]; then
-  echo "could not find timestamp for debian packages"
-  exit 1
+    echo "could not find timestamp for debian packages"
+    exit 1
 fi
 
 DEBIAN_SNAPSHOT=${DEBIAN_SNAPSHOT_BASE}${DEBIAN_SNAPSHOT_LATEST}
diff --git a/contrib/freeze_packages.sh b/contrib/freeze_packages.sh
index 0f9a159b3..129a57feb 100755
--- a/contrib/freeze_packages.sh
+++ b/contrib/freeze_packages.sh
@@ -13,7 +13,7 @@ else
     SYSTEM_PYTHON=$(which $SYSTEM_PYTHON) || printf ""
 fi
 if [[ ! "$SYSTEM_PYTHON" ]] ; then
-    echo "Please specify which python to use in \$SYSTEM_PYTHON" && exit 1;
+    echo "Please specify which python to use in \$SYSTEM_PYTHON" && exit 1
 fi
 
 which virtualenv > /dev/null 2>&1 || { echo "Please install virtualenv" && exit 1; }
diff --git a/contrib/make_packages.sh b/contrib/make_packages.sh
index 89b76249f..a7e970ef6 100755
--- a/contrib/make_packages.sh
+++ b/contrib/make_packages.sh
@@ -10,7 +10,7 @@ PACKAGES="$PROJECT_ROOT"/packages/
 test -n "$CONTRIB" -a -d "$CONTRIB" || exit
 
 if [ -d "$PACKAGES" ]; then
-  rm -r "$PACKAGES"
+    rm -r "$PACKAGES"
 fi
 
 # create virtualenv
diff --git a/contrib/osx/compare_dmg b/contrib/osx/compare_dmg
index fbc263ab7..1609c44a2 100755
--- a/contrib/osx/compare_dmg
+++ b/contrib/osx/compare_dmg
@@ -1,4 +1,4 @@
-#!/usr/bin/env bash                                                                                                                                                                                               
+#!/usr/bin/env bash
 set -e
 
 if [ $(uname) != "Darwin" ]; then
diff --git a/contrib/osx/make_osx.sh b/contrib/osx/make_osx.sh
index 1712323e9..6c160a225 100755
--- a/contrib/osx/make_osx.sh
+++ b/contrib/osx/make_osx.sh
@@ -73,7 +73,7 @@ if [ ! -f "$CACHEDIR/$PKG_FILE" ]; then
     curl -o "$CACHEDIR/$PKG_FILE" "https://www.python.org/ftp/python/${PYTHON_VERSION}/$PKG_FILE"
 fi
 echo "c2073d44c404c661dadbf0cbda55c6e7d681baba9178ed1bdb126d34caa898a9  $CACHEDIR/$PKG_FILE" | shasum -a 256 -c \
-     || fail "python pkg checksum mismatched"
+    || fail "python pkg checksum mismatched"
 sudo installer -pkg "$CACHEDIR/$PKG_FILE" -target / \
     || fail "failed to install python"
 
@@ -232,7 +232,7 @@ find "$VENV_DIR/lib/python$PY_VER_MAJOR/site-packages/" -type f -name '*.so' -pr
 info "Faking timestamps..."
 find . -exec touch -t '200101220000' {} + || true
 
-VERSION=`git describe --tags --dirty --always`
+VERSION=$(git describe --tags --dirty --always)
 
 info "Building binary"
 ELECTRUM_VERSION=$VERSION pyinstaller --noconfirm --ascii --clean contrib/osx/osx.spec || fail "Could not build binary"
diff --git a/contrib/osx/notarize_app.sh b/contrib/osx/notarize_app.sh
index 7a89456cc..27f4a6dfe 100755
--- a/contrib/osx/notarize_app.sh
+++ b/contrib/osx/notarize_app.sh
@@ -24,53 +24,57 @@ ditto -c -k --rsrc --keepParent "$APP_BUNDLE" "${APP_BUNDLE}.zip"
 # Submit for notarization
 echo "Submitting $APP_BUNDLE for notarization..."
 RESULT=$(xcrun altool --notarize-app --type osx \
-  --file "${APP_BUNDLE}.zip" \
-  --primary-bundle-id org.electrum.electrum \
-  --username $APPLE_ID_USER \
-  --password @env:APPLE_ID_PASSWORD \
-  --output-format xml)
+    --file "${APP_BUNDLE}.zip" \
+    --primary-bundle-id org.electrum.electrum \
+    --username $APPLE_ID_USER \
+    --password @env:APPLE_ID_PASSWORD \
+    --output-format xml
+)
 
 if [ $? -ne 0 ]; then
-  echo "Submitting $APP_BUNDLE failed:"
-  echo "$RESULT"
-  exit 1
+    echo "Submitting $APP_BUNDLE failed:"
+    echo "$RESULT"
+    exit 1
 fi
 
 REQUEST_UUID=$(echo "$RESULT" | xpath \
-  "//key[normalize-space(text()) = 'RequestUUID']/following-sibling::string[1]/text()" 2> /dev/null)
+    "//key[normalize-space(text()) = 'RequestUUID']/following-sibling::string[1]/text()" 2>/dev/null
+)
 
 if [ -z "$REQUEST_UUID" ]; then
-  echo "Submitting $APP_BUNDLE failed:"
-  echo "$RESULT"
-  exit 1
+    echo "Submitting $APP_BUNDLE failed:"
+    echo "$RESULT"
+    exit 1
 fi
 
 echo "$(echo "$RESULT" | xpath \
-  "//key[normalize-space(text()) = 'success-message']/following-sibling::string[1]/text()" 2> /dev/null)"
+    "//key[normalize-space(text()) = 'success-message']/following-sibling::string[1]/text()" 2> /dev/null)"
 
 # Poll for notarization status
 echo "Submitted notarization request $REQUEST_UUID, waiting for response..."
 sleep 60
 while :
 do
-  RESULT=$(xcrun altool --notarization-info "$REQUEST_UUID" \
-    --username "$APPLE_ID_USER" \
-    --password @env:APPLE_ID_PASSWORD \
-    --output-format xml)
-  STATUS=$(echo "$RESULT" | xpath \
-    "//key[normalize-space(text()) = 'Status']/following-sibling::string[1]/text()" 2> /dev/null)
+    RESULT=$(xcrun altool --notarization-info "$REQUEST_UUID" \
+        --username "$APPLE_ID_USER" \
+        --password @env:APPLE_ID_PASSWORD \
+        --output-format xml
+    )
+    STATUS=$(echo "$RESULT" | xpath \
+        "//key[normalize-space(text()) = 'Status']/following-sibling::string[1]/text()" 2>/dev/null
+    )
 
-  if [ "$STATUS" = "success" ]; then
-    echo "Notarization of $APP_BUNDLE succeeded!"
-    break
-  elif [ "$STATUS" = "in progress" ]; then
-    echo "Notarization in progress..."
-    sleep 20
-  else
-    echo "Notarization of $APP_BUNDLE failed:"
-    echo "$RESULT"
-    exit 1
-  fi
+    if [ "$STATUS" = "success" ]; then
+        echo "Notarization of $APP_BUNDLE succeeded!"
+        break
+    elif [ "$STATUS" = "in progress" ]; then
+        echo "Notarization in progress..."
+        sleep 20
+    else
+        echo "Notarization of $APP_BUNDLE failed:"
+        echo "$RESULT"
+        exit 1
+    fi
 done
 
 # Staple the notary ticket
diff --git a/contrib/osx/package.sh b/contrib/osx/package.sh
index c746efe5a..1d4236c1a 100755
--- a/contrib/osx/package.sh
+++ b/contrib/osx/package.sh
@@ -31,26 +31,26 @@ fi
 mkdir -p ~/bin
 
 if ! which ${genisoimage} > /dev/null 2>&1; then
-	mkdir -p /tmp/electrum-macos
-	cd /tmp/electrum-macos
-	info "Downloading cdrkit $cdrkit_version"
-	wget -nc ${cdrkit_download_path}/${cdrkit_file_name}
-	tar xvf ${cdrkit_file_name}
-
-	info "Patching genisoimage"
-	cd cdrkit-${cdrkit_version}
-	patch -p1 < $CONTRIB/osx/cdrkit-deterministic.patch
-
-	info "Building genisoimage"
-	cmake . -Wno-dev
-	make genisoimage
-	cp genisoimage/genisoimage ~/bin/${genisoimage}
+    mkdir -p /tmp/electrum-macos
+    cd /tmp/electrum-macos
+    info "Downloading cdrkit $cdrkit_version"
+    wget -nc ${cdrkit_download_path}/${cdrkit_file_name}
+    tar xvf ${cdrkit_file_name}
+
+    info "Patching genisoimage"
+    cd cdrkit-${cdrkit_version}
+    patch -p1 <$CONTRIB/osx/cdrkit-deterministic.patch
+
+    info "Building genisoimage"
+    cmake . -Wno-dev
+    make genisoimage
+    cp genisoimage/genisoimage ~/bin/${genisoimage}
 fi
 
 if ! which dmg > /dev/null 2>&1; then
     mkdir -p /tmp/electrum-macos
-	cd /tmp/electrum-macos
-	info "Downloading libdmg"
+    cd /tmp/electrum-macos
+    info "Downloading libdmg"
     LD_PRELOAD= git clone ${libdmg_url}
     cd libdmg-hfsplus
     info "Building libdmg"
@@ -60,11 +60,11 @@ if ! which dmg > /dev/null 2>&1; then
 fi
 
 ${genisoimage} -version || fail "Unable to install genisoimage"
-dmg -|| fail "Unable to install libdmg"
+dmg - || fail "Unable to install libdmg"
 
 plist=$1/Contents/Info.plist
 test -f "$plist" || fail "Info.plist not found"
-VERSION=$(grep -1 ShortVersionString $plist |tail -1|gawk 'match($0, /<string>(.*)<\/string>/, a) {print a[1]}')
+VERSION=$(grep -1 ShortVersionString $plist | tail -1 | gawk 'match($0, /<string>(.*)<\/string>/, a) {print a[1]}')
 echo $VERSION
 
 rm -rf /tmp/electrum-macos/image > /dev/null 2>&1
diff --git a/contrib/release.sh b/contrib/release.sh
index 57cd0fc61..9fec67cd4 100755
--- a/contrib/release.sh
+++ b/contrib/release.sh
@@ -73,9 +73,9 @@ if [ ! -z "$RELEASEMANAGER" ] ; then
 fi
 
 
-VERSION=`python3 -c "import electrum; print(electrum.version.ELECTRUM_VERSION)"`
+VERSION=$(python3 -c "import electrum; print(electrum.version.ELECTRUM_VERSION)")
 info "VERSION: $VERSION"
-REV=`git describe --tags`
+REV=$(git describe --tags)
 info "REV: $REV"
 COMMIT=$(git rev-parse HEAD)
 
@@ -95,7 +95,7 @@ tarball="Electrum-$VERSION.tar.gz"
 if test -f "dist/$tarball"; then
     info "file exists: $tarball"
 else
-   ./contrib/build-linux/sdist/build.sh
+    ./contrib/build-linux/sdist/build.sh
 fi
 
 # create source-only tarball
@@ -103,7 +103,7 @@ srctarball="Electrum-sourceonly-$VERSION.tar.gz"
 if test -f "dist/$srctarball"; then
     info "file exists: $srctarball"
 else
-   OMIT_UNCLEAN_FILES=1 ./contrib/build-linux/sdist/build.sh
+    OMIT_UNCLEAN_FILES=1 ./contrib/build-linux/sdist/build.sh
 fi
 
 # appimage
@@ -184,7 +184,7 @@ sha256sum contrib/build-wine/dist/*.exe
 echo -n "proceed (y/n)? "
 read answer
 
-if [ "$answer" != "y" ] ;then
+if [ "$answer" != "y" ]; then
     echo "exit"
     exit 1
 fi
@@ -250,7 +250,7 @@ else
     info "updating www repo"
     ./contrib/make_download $WWW_DIR
     info "signing the version announcement file"
-    sig=`./run_electrum -o signmessage $ELECTRUM_SIGNING_ADDRESS $VERSION -w $ELECTRUM_SIGNING_WALLET`
+    sig=$(./run_electrum -o signmessage $ELECTRUM_SIGNING_ADDRESS $VERSION -w $ELECTRUM_SIGNING_WALLET)
     echo "{ \"version\":\"$VERSION\", \"signatures\":{ \"$ELECTRUM_SIGNING_ADDRESS\":\"$sig\"}}" > $WWW_DIR/version
 
 
diff --git a/contrib/upload.sh b/contrib/upload.sh
index 5833fe16a..4d8d41e17 100755
--- a/contrib/upload.sh
+++ b/contrib/upload.sh
@@ -15,7 +15,7 @@ fi
 
 cd "$PROJECT_ROOT"
 
-version=`git describe --tags --abbrev=0`
+version=$(git describe --tags --abbrev=0)
 echo $version
 
 if [ -z "$ELECBUILD_UPLOADFROM" ]; then