Fix escaping of PR title/body

Author: nicolas-grekas

.github/workflows/fabbot.yml

@@ -20,16 +20,15 @@ jobs:
     runs-on: ubuntu-24.04
     steps:
       - name: Checkout code
+        env:
+          PR_NUMBER: ${{ github.event.pull_request.number }}
+          PR_HEAD_SHA: ${{ github.event.pull_request.head.sha }}
+          REPO_OWNER: ${{ github.repository_owner }}
+          REPO_NAME: ${{ github.event.repository.name }}
         run: |
           # Checkout patched files using the REST API and install dependencies concurrently
-          PR_NUMBER="${{ github.event.pull_request.number }}"
-          PR_HEAD_SHA="${{ github.event.pull_request.head.sha }}"
-          REPO_OWNER="${{ github.repository_owner }}"
-          REPO_NAME="${{ github.event.repository.name }}"
-
           pip install codespell &
           composer global require -q friendsofphp/php-cs-fixer seld/jsonlint symfony/yaml &
-
           mkdir a
 
           gh api -H "Accept: application/vnd.github.v3.raw" \
@@ -86,10 +85,14 @@ jobs:
 
       - name: Check for merge commits
         if: always()
+        env:
+          PR_NUMBER: ${{ github.event.pull_request.number }}
+          REPO_OWNER: ${{ github.repository_owner }}
+          REPO_NAME: ${{ github.event.repository.name }}
         run: |
           # If a PR contains merge commits, fail the job
           gh api -H "Accept: application/vnd.github.v3+json" \
-            "/repos/${{ github.repository_owner }}/${{ github.event.repository.name }}/pulls/${{ github.event.pull_request.number }}/commits" \
+            "/repos/$REPO_OWNER/$REPO_NAME/pulls/$PR_NUMBER/commits" \
             | jq -r '.[].parents | length > 1' | grep true > /dev/null && {
               echo "::error::Merge commits are not allowed in pull requests."
               echo "Please rebase your branch."
@@ -138,11 +141,11 @@ jobs:
 
       - name: Check PR header
         if: always()
+        env:
+          PR_TITLE: ${{ github.event.pull_request.title }}
+          PR_BODY: ${{ github.event.pull_request.body }}
         run: |
           # Check if the PR title and body follow the Symfony contribution guidelines
-          PR_TITLE="${{ github.event.pull_request.title }}"
-          PR_BODY="${{ github.event.pull_request.body }}"
-
           if [[ "${{ inputs.check_license }}" == "true" ]]; then
             if [[ ! "$PR_BODY" =~ \|\ License[\ ]+\|\ MIT ]]; then
               echo "::error::You must add the standard contribution header in the PR description"