Handle char conversion wrt. to_lower correctly, according to cppreference.

1 files changed, 1 insertions, 1 deletions

diff --git a/src/util.h b/src/util.h
index 8b41014..6e1bc7b 100644
--- a/src/util.h
+++ b/src/util.h
@@ -9,7 +9,7 @@
 #include <filesystem>
 #include <cstdlib>
 
-std::string to_lower(const std::string& str);
+std::string to_lower(std::string str);
 
 std::string readFile(const std::string& fileName);
 ctor::language languageFromExtension(const std::filesystem::path& file);