Use str::strip_prefix

Author: justsmth

tests/parse_callbacks/mod.rs

@@ -16,8 +16,8 @@ impl RemoveFunctionPrefixParseCallback {
 impl ParseCallbacks for RemoveFunctionPrefixParseCallback {
     fn generated_name_override(&self, function_name: &str) -> Option<String> {
         if let Some(prefix) = &self.remove_function_prefix {
-            if function_name.starts_with(prefix) {
-                return Some(function_name[prefix.len()..].to_string());
+            if let Some(name) = function_name.strip_prefix(prefix) {
+                return Some(name.to_string())
             }
         }
         None