Fix iterator source

Author: stevieraykatz

.github/workflows/test.yml

@@ -55,21 +55,32 @@ jobs:
           else
             CHANGED_FILES=$(git diff --name-only --diff-filter=ACMR HEAD^..HEAD | grep '\.sol$' || true)
           fi
-          echo "files=$CHANGED_FILES" >> $GITHUB_OUTPUT
-          echo "Changed Solidity files: $CHANGED_FILES"
+          
+          # Store files in a way that GitHub Actions can handle properly
+          if [ -n "$CHANGED_FILES" ]; then
+            echo "has_files=true" >> $GITHUB_OUTPUT
+            # Save files to a temporary file for the next step
+            echo "$CHANGED_FILES" > /tmp/changed_files.txt
+            echo "Changed Solidity files:"
+            echo "$CHANGED_FILES"
+          else
+            echo "has_files=false" >> $GITHUB_OUTPUT
+            echo "No Solidity files changed"
+          fi
 
       - name: Check formatting on changed files
-        if: steps.changed-files.outputs.files != ''
+        if: steps.changed-files.outputs.has_files == 'true'
         run: |
-          # Convert the file list to an array and pass each file individually
-          FILES="${{ steps.changed-files.outputs.files }}"
-          if [ -n "$FILES" ]; then
-            echo "Checking formatting for files: $FILES"
-            echo "$FILES" | while IFS= read -r file; do
+          # Read files from the temporary file created in the previous step
+          if [ -f /tmp/changed_files.txt ]; then
+            echo "Checking formatting for changed Solidity files..."
+            while IFS= read -r file; do
               if [ -n "$file" ]; then
                 echo "Checking: $file"
                 forge fmt --check "$file"
               fi
-            done
+            done < /tmp/changed_files.txt
+          else
+            echo "No changed files found"
           fi
         id: fmt