fix(fixtures): use the correct syntax while checking fixture results (#1099)

Author: orhun

.github/actions/run-fixtures-test/action.yml

@@ -51,22 +51,24 @@ runs:
       working-directory: ${{ inputs.fixtures-dir }}
       env:
         IN_DATE_FORMAT: ${{ inputs.date-format }}
+      shell: bash
       run: |
         if [ -f expected.md ]; then
           current_date=$(date +"$IN_DATE_FORMAT")
           sed -i "s/<<DATE>>/$current_date/g" expected.md
-          if [ ! diff --strip-trailing-cr output.md expected.md ]; then
+          if ! diff --strip-trailing-cr output.md expected.md; then
             echo "The generated changelog does not match the expected changelog."
             exit 1
           fi
         fi
-      shell: bash
 
     - name: Compare the return code with the expected return code
       working-directory: ${{ inputs.fixtures-dir }}
+      shell: bash
       run: |
-        if [ -f expected.rc ] && [ ! diff --skip-trailing-cr output.rc expected.rc ]; then
-          echo "The return code does not match the expected return code."
-          exit 1
+        if [ -f expected.rc ]; then
+          if ! diff --strip-trailing-cr output.rc expected.rc; then
+            echo "The return code does not match the expected return code."
+            exit 1
+          fi
         fi
-      shell: bash