This is an automatic notification regarding your bug report which was filed against the emacs package: #4483: info doc Character Classes don't discuss case-fold-search for [:lower:] [:upper:] It has been closed by Chong Yidong . Their explanation is attached below along with your original report. If this explanation is unsatisfactory and you have not received a better one in a separate message then please contact Chong Yidong by replying to this email. -- 4483: http://debbugs.gnu.org/cgi/bugreport.cgi?bug=4483 Emacs Bug Tracking System Contact help-debbugs@gnu.org with problems