(defcustom idlwave-shell-file-name-chars "~/A-Za-z0-9+:_.$#%={}\\- "
"The characters allowed in file names, as a string.
-Used for file name completion. Must not contain ‘'’, ‘,’ and ‘\"’
+Used for file name completion. Must not contain `\\='', `,' and `\"'
because these are used as separators by IDL."
:group 'idlwave-shell-general-setup
:type 'string)