make gcovr report nested. dunno if this works

Author: niknal357

gcov_coverage.sh

@@ -6,7 +6,8 @@ gcovr \
     --exclude '/usr/include/.*' \
     --html \
     --html-details \
+    --html-nested \
     -o coverage/coverage.html \
     --gcov-ignore-parse-errors=negative_hits.warn_once_per_file \
     --gcov-ignore-errors=no_working_dir_found
-echo "Find coverage report at: $(realpath ./coverage/coverage.html)"
+echo "Find coverage report at: $(realpath ./coverage/coverage.html)"