CI: Disallow spaces just before the separating colon in commit titles

.github/workflows/lintcommits.yml

@@ -34,7 +34,7 @@ jobs:
         uses: tim-actions/commit-message-checker-with-regex@v0.3.1
         with:
           commits: ${{ steps.get-pr-commits.outputs.commits }}
-          pattern: '^\S.*?: .+'
+          pattern: '^\S.*?\S: .+'
           error: 'Missing category in commit title (if this is a fix up of a previous commit, it should be squashed)'
 
       - name: Check first word of title for capitalization

Meta/lint-commit.sh

@@ -23,7 +23,7 @@ while read -r line; do
   ((line_number += 1))
   line_length=${#line}
 
-  category_pattern="^\S.*?: .+"
+  category_pattern="^\S.*?\S: .+"
   if [[ $line_number -eq 1 ]] && (echo "$line" | grep -P -v -q "$category_pattern"); then
     error "Missing category in commit title (if this is a fix up of a previous commit, it should be squashed)"
   fi