Language protocol: optimization of autocomplete insertion when language server answers with incomplete insertText

src/source_language_protocol.cc

@@ -1225,11 +1225,14 @@ void Source::LanguageProtocolView::setup_autocomplete() {
             auto detail=it->second.get<std::string>("detail", "");
             auto documentation=it->second.get<std::string>("documentation", "");
             auto insert=it->second.get<std::string>("insertText", "");
-            if(!insert.empty()) { // In case ( is missing in insert but is present in label
+            if(!insert.empty()) {
+              // In case ( is missing in insert but is present in label
+              if(label.size()>insert.size() && label.back()==')' && insert.find('(')==std::string::npos) {
                 auto pos=label.find('(');
-              if(pos!=std::string::npos && pos==insert.size() && pos+1<label.size() && label.back()==')' && insert.find('(')==std::string::npos)
+                if(pos!=std::string::npos && pos==insert.size() && pos+1<label.size())
                   insert+="(${1:"+label.substr(pos+1, label.size()-1-(pos+1))+"})";
               }
+            }
             else {
               insert=label;
               auto kind=it->second.get<unsigned>("kind", 0);