fix: handle backslashes in filenames in _forgit_worktree_changes

Git escapes backslashes with `git status` even when
`core.quotepath=false` is set. Use `--porcelain -z` with `git status` as
a more robust approach to fix this.

Fixes #467

Author: sandr01d

bin/git-forgit

@@ -224,7 +224,8 @@ _forgit_worktree_changes() {
     untracked=$(git config --get-color color.status.untracked red)
     show_untracked=$(git config status.showUntrackedFiles)
 
-    git -c color.status=always -c status.relativePaths=true -c core.quotePath=false status -s --untracked="${show_untracked:-all}" |
+    git -c color.status=always -c status.relativePaths=true status --porcelain -zs --untracked="${show_untracked:-all}" |
+        tr '\0' '\n' |
         grep -F -e "$changed" -e "$unmerged" -e "$untracked" |
         sed -E 's/^(..[^[:space:]]*)[[:space:]]+(.*)$/[\1]  \2/'
 }

tests/working-tree-changes.test.sh

@@ -23,6 +23,7 @@
     git add "staged file.txt"
 
     touch "untracked_file.txt"
+    touch 'untracked_with_\backslash'
  }
 
  function test_forgit_worktree_changes_contains_modified() {
@@ -56,3 +57,11 @@
 
      assert_not_contains "tracked file.txt" "$output"
  }
+
+ function test_forgit_worktree_changes_supports_backslashes() {
+     local output
+
+     output=$(_forgit_worktree_changes)
+
+     assert_contains 'untracked_with_\backslash' "$output"
+ }