Fix linter-issues

Author: tvdijen

.github/workflows/xmllinter.yml

@@ -43,21 +43,21 @@ jobs:
                 echo "config<<EOF";
                 cat "${{ inputs.config_file }}";
                 echo "EOF";
-            } >> $GITHUB_OUTPUT
+            } >> "$GITHUB_OUTPUT"
           else
             echo "config={}" >> $GITHUB_OUTPUT
           fi
 
       - name: Substract ignore-list from config
         id: read-ignore
         run: |
-          IGNORE=$(echo '${{ toJSON(fromJSON(steps.read-json.outputs.config).ignore) }}' | jq -c '.')
+          IGNORE="$(echo '${{ toJSON(fromJSON(steps.read-json.outputs.config).ignore) }}' | jq -c '.')"
           echo "ignore=${IGNORE}" >> $GITHUB_OUTPUT
 
       - name: Find all XML-files in this repository
         id: find-xml
         run: |
-          filelist=$(find . -type f -iname "*.xml" | jo -a)
+          filelist="$(find . -type f -iname "*.xml" | jo -a)"
           echo "filelist=${filelist}" >> $GITHUB_OUTPUT
 
       - name: Lint XML