tools: Fix svn status parsing (#34651)

While `svn status` normally looks like it only outputs one flag followed
by 7 spaces then the filename, in fact six of those seven spaces can be
additional flags. Our current parsing breaks if we have any non-space
flags after a space flag.

Instead, extract the seven flags, log if any of the last six aren't
spaces, and then process as before.

Also it seems `tools/deploy-assets-to-svn.sh` missed the "peg revisions"
fix from #31695, add that in there too.

Committed via a GitHub action: https://github.com/Automattic/jetpack/actions/runs/7212569534

.github/files/wp-svn-autopublish.sh

@@ -60,11 +60,16 @@ find trunk -type d -empty -print -delete
 echo '::endgroup::'
 
 echo "::group::Adding and removing SVN files"
-while IFS=" " read -r FLAG FILE; do
+while IFS= read -r LINE; do
+	FLAGS="${LINE:0:7}"
+	FILE="${LINE:8}"
+	if [[ "$FLAGS" != ?'      ' ]]; then
+		echo "Unexpected svn flags: $LINE"
+	fi
 	# The appending of an `@` to the filename here avoids problems with filenames containing `@` being interpreted as "peg revisions".
-	if [[ "$FLAG" == '!' ]]; then
+	if [[ "${FLAGS:0:1}" == '!' ]]; then
 		svn rm "${FILE}@"
-	elif [[ "$FLAG" == "?" ]]; then
+	elif [[ "${FLAGS:0:1}" == "?" ]]; then
 		svn add "${FILE}@"
 	fi
 done < <( svn status )