Use CSV-separated outputs @ get-changed-files @ CI (#105151)

Co-authored-by: Hugo van Kemenade <hugovk@users.noreply.github.com>

.github/workflows/build.yml

@@ -87,21 +87,9 @@ jobs:
         with:
           filter: |
             Doc/**
-            # Temporarily skip paths with spaces
-            # (i.e. "C API", "Core and Builtins")
-            # to avoid "Error: One of your files includes a space".
-            # Pending https://github.com/python/core-workflow/issues/186
-            # Misc/**
-            Misc/NEWS.d/next/Build/**
-            Misc/NEWS.d/next/Documentation/**
-            Misc/NEWS.d/next/IDLE/**
-            Misc/NEWS.d/next/Library/**
-            Misc/NEWS.d/next/Security/**
-            Misc/NEWS.d/next/Tests/**
-            Misc/NEWS.d/next/Tools-Demos/**
-            Misc/NEWS.d/next/Windows/**
-            Misc/NEWS.d/next/macOS/**
+            Misc/**
             .github/workflows/reusable-docs.yml
+          format: csv  # works for paths with spaces
       - name: Check for docs changes
         if: >-
           github.event_name == 'pull_request'

.github/workflows/reusable-docs.yml

@@ -38,12 +38,14 @@ jobs:
       uses: Ana06/get-changed-files@v2.2.0
       with:
         filter: "Doc/**"
+        format: csv  # works for paths with spaces
     - name: 'Build changed files in nit-picky mode'
       if: github.event_name == 'pull_request'
       continue-on-error: true
       run: |
+        set -Eeuo pipefail
         # Mark files the pull request modified
-        touch ${{ steps.changed_files.outputs.added_modified }}
+        python Doc/tools/touch-clean-files.py --clean '${{ steps.changed_files.outputs.added_modified }}'
         # Build docs with the '-n' (nit-picky) option; convert warnings to annotations
         make -C Doc/ PYTHON=../python SPHINXOPTS="-q -n --keep-going" html 2>&1 |
             python Doc/tools/warnings-to-gh-actions.py