Fixed clang-tidy warnings

src/common/generators/mermaid/generator.cc

@@ -19,8 +19,7 @@
 
 namespace clanguml::common::generators::mermaid {
 
-std::string to_mermaid(
-    relationship_t r, const std::optional<std::string> & /*style*/)
+std::string to_mermaid(relationship_t r)
 {
     switch (r) {
     case relationship_t::kOwnership:

src/common/generators/mermaid/generator.h

@@ -38,8 +38,7 @@ using clanguml::common::model::element;
 using clanguml::common::model::message_t;
 using clanguml::common::model::relationship_t;
 
-std::string to_mermaid(
-    relationship_t r, const std::optional<std::string> &style);
+std::string to_mermaid(relationship_t r);
 std::string to_mermaid(access_t scope);
 std::string to_mermaid(message_t r);
 

src/common/generators/plantuml/generator.h

@@ -457,8 +457,8 @@ void generator<C, D>::generate_style(std::ostream &ostr,
 {
     const auto &config = generators::generator<C, D>::config();
 
-    if (el.style() && !el.style().value().empty())
-        ostr << " " << *el.style();
+    if (el.style() && !el.style().value().empty()) // NOLINT
+        ostr << " " << *el.style();                // NOLINT
     else if (config.puml) {
         if (const auto config_style = config.puml().get_style(element_type);
             config_style) {