Ignore whitespace in diff

.github/workflows/check_nexus_version.yml

@@ -11,18 +11,14 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v2
-      - name: Set up Python 3.10
-        uses: actions/setup-python@v2
-        with:
-          python-version: "3.10"
       - name: Generate nexus git version
         run: |
           git submodule sync --recursive
           git submodule update --init --recursive --jobs=4
           git submodule foreach --recursive 'git fetch --tags'
           cd pynxtools/definitions
-          git describe --dirty --tags --long --match "*[0-9]*" | tr -d '\n' | tr -d ' ' > ../nexus-ref.txt
+          git describe --dirty --tags --long --match "*[0-9]*" > ../nexus-ref.txt
           cd ../
       - name: Diff
         run: |
-          diff pynxtools/nexus-version.txt pynxtools/nexus-ref.txt
+          diff -w pynxtools/nexus-version.txt pynxtools/nexus-ref.txt