(xdb): Fix quoting in docstring.

diff --git a/lisp/progmodes/gud.el b/lisp/progmodes/gud.el
index f3a95514c13b8461991e4f8673e3bb65a7671227..0737d1aed621b18f6692969bb35e9395ef13075e 100644 (file)
--- a/lisp/progmodes/gud.el
+++ b/lisp/progmodes/gud.el
@@ -1220,7 +1220,7 @@ containing the executable being debugged."
 The directory containing FILE becomes the initial working directory
 and source-file directory for your debugger.
 
-You can set the variable 'gud-xdb-directories' to a list of program source
+You can set the variable `gud-xdb-directories' to a list of program source
 directories if your program contains sources from more than one directory."
   (interactive (list (gud-query-cmdline 'xdb)))