changed a small setting

vimrc

@@ -214,7 +214,7 @@ let g:ycm_autoclose_preview_window_after_insertion = 1
 let g:ycm_key_list_select_completion=['<Down>']
 let g:ycm_key_list_previous_completion=['<Up>']
 let g:ycm_collect_identifiers_from_tags_files=0
-let g:ycm_collect_identifiers_from_comments_and_strings = 1
+let g:ycm_collect_identifiers_from_comments_and_strings = 0
 let g:ycm_complete_in_comments = 1
 let g:ycm_key_invoke_completion = '<C-N>'
 "let g:ycm_extra_conf_globlist = ['~/.ycm_extra_conf.py']