@cindex wildcard characters in file names
@vindex find-file-wildcards
If the file name you specify contains shell-style wildcard
-characters, Emacs visits all the files that match it. Wildcards
-include @samp{?}, @samp{*}, and @samp{[@dots{}]} sequences. To enter
-the wild card @samp{?} in a file name in the minibuffer, you need to
-type @kbd{C-q ?}. @xref{Quoted File Names}, for information on how to
-visit a file whose name actually contains wildcard characters. You
-can disable the wildcard feature by customizing
-@code{find-file-wildcards}.
+characters, Emacs visits all the files that match it. (On
+case-insensitive filesystems, Emacs matches the wildcards disregarding
+the letter case.) Wildcards include @samp{?}, @samp{*}, and
+@samp{[@dots{}]} sequences. To enter the wild card @samp{?} in a file
+name in the minibuffer, you need to type @kbd{C-q ?}. @xref{Quoted
+File Names}, for information on how to visit a file whose name
+actually contains wildcard characters. You can disable the wildcard
+feature by customizing @code{find-file-wildcards}.
If you visit a file that the operating system won't let you modify,
or that is marked read-only, Emacs makes the buffer read-only too, so