ci: apply review comments on patch upload

Author: JohelEGP

.github/workflows/regression-tests.yml

@@ -7,7 +7,7 @@ on:
   workflow_dispatch:
 
 jobs:
-  regression-tests-linux-mac:
+  regression-tests:
     name: Run on ${{ matrix.os }} using ${{ matrix.compiler }}
     runs-on: ${{ matrix.os }}
     env:
@@ -49,3 +49,4 @@ jobs:
       with:
         name: ${{ matrix.compiler }}-patch.diff
         path: regression-tests/${{ matrix.compiler }}-patch.diff
+        if-no-files-found: ignore

regression-tests/run-tests.sh

@@ -42,7 +42,7 @@ check_file () {
         diff_output=$(git diff --ignore-cr-at-eol -- "$file")
         if [[ -n "$diff_output" ]]; then
             echo "            Non-matching $description:"
-            printf "\n$diff_output\n\n"
+            printf "\n$diff_output\n\n" | tee -a "$cxx_compiler-patch.diff"
             failure=1
         fi
     fi
@@ -195,7 +195,7 @@ for test_file in $tests; do
         # The source is temporarily copied to avoid issues with bash paths in cl.exe
         (cd $exec_out_dir; \
          cp ../../$expected_src $generated_cpp_name;
-         $compiler_cmd "$test_bin" \
+         $compiler_cmd"$test_bin" \
                         $generated_cpp_name \
                         > $generated_cpp_name.output 2>&1)
         compilation_result=$?