Synchronize cross-compilation scripts

README.adoc

@@ -62,7 +62,7 @@ for Windows.  It isn't particularly usable on that system, if only because
 selection watching is a very X11/Wayland-specific feature.  Beware that build
 dependencies take up almost a gigabyte of disk space.
 
- $ sh cmake/Win64Depends.sh
+ $ sh -e cmake/Win64Depends.sh
  $ cmake -DCMAKE_TOOLCHAIN_FILE=cmake/Win64CrossToolchain.cmake \
    -DCMAKE_BUILD_TYPE=Release -B build
  $ cmake --build build -- package

cmake/Win32CleanupAdwaita.sh

@@ -1,6 +1,6 @@
 #!/bin/sh -e
-# Removes unused icons from the Adwaita theme, it could be even more aggressive,
-# since it keeps around lots of sizes and all the GTK+ stock icons
+# Removes unused icons from the Adwaita theme. It could be even more aggressive,
+# since it keeps around lots of sizes and all the GTK+ stock icons.
 export LC_ALL=C
 find share/icons/Adwaita -type f | awk 'BEGIN {
 	while (("grep -aho \"[a-z][a-z-]*\" *.dll *.exe" | getline) > 0)
@@ -17,4 +17,4 @@ find share/icons/Adwaita -type f | awk 'BEGIN {
 		sub(/-(ltr|rtl|symbolic)$/, "", base)) {}
 	if (!keep)
 		print
-}' | xargs rm
+}' | xargs rm --

cmake/Win64Depends.sh

@@ -1,5 +1,5 @@
 #!/bin/sh -e
-# Win64Depends.sh: download dependencies from MSYS2 for cross-compilation
+# Win64Depends.sh: download dependencies from MSYS2 for cross-compilation.
 # Dependencies: AWK, sed, sha256sum, cURL, bsdtar, wine64
 repository=https://repo.msys2.org/mingw/mingw64/
 
@@ -57,12 +57,12 @@ configure() {
 }
 
 # This directory name matches the prefix in .pc files, so we don't need to
-# modify them (pkgconf has --prefix-variable, but CMake can't pass that option)
+# modify them (pkgconf has --prefix-variable, but CMake can't pass that option).
 mkdir -p mingw64
 cd mingw64
 dbsync
 fetch mingw-w64-x86_64-gtk3 mingw-w64-x86_64-icu \
-	mingw-w64-x86_64-libwinpthread-git # because we don't do "provides"?
+	mingw-w64-x86_64-libwinpthread-git # Because we don't do "provides"?
 verify
 extract
 configure