misc: GHA does not like YAML >

Author: JDBetteridge

.github/workflows/pytest-core-nompi.yaml

@@ -243,14 +243,14 @@ jobs:
         tag: ${{ matrix.name }}
         env: |
           CODECOV_TOKEN=${{ secrets.CODECOV_TOKEN }}
-        command: >
-          pytest
-            -v
-            -k "${{ matrix.test-set }}"
-            -m "not parallel"
-            --cov
-            --cov-config=.coveragerc
-            --cov-report=xml
+        command: |
+          pytest \
+            -v \
+            -k "${{ matrix.test-set }}" \
+            -m "not parallel" \
+            --cov \
+            --cov-config=.coveragerc \
+            --cov-report=xml \
             tests/
 
     - name: Cleanup docker image