Create temp file with changed LOC for lint CI action

Author: nifadyev

.github/workflows/pr.yml

@@ -14,4 +14,9 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - uses: actions/checkout@v4
+    - name: Write git diff to temp file
+        run: |
+          git diff --unified=0 *.md translations/*/*.md | grep -Po '(?<=^\+)(?!\+\+).*' > ${{ runner.temp }}/diff.md
     - uses: DavidAnson/markdownlint-cli2-action@v17
+      with:
+        globs: "${{ runner.temp }}/diff.md"

README.md

@@ -21,6 +21,7 @@ While some of the examples you see below may not be WTFs in the truest sense, bu
 If you're an experienced Python programmer, you can take it as a challenge to get most of them right in the first attempt. You may have already experienced some of them before, and I might be able to revive sweet old memories of yours! :sweat_smile:
 
 PS: If you're a returning reader, you can learn about the new modifications [here](https://github.com/satwikkansal/wtfpython/releases/) (the examples marked with asterisk are the ones added in the latest major revision).
+[invalid link]()
 
 So, here we go...