(compilation-directory-matcher): Doc fix (Nil -> nil).

diff --git a/lisp/progmodes/compile.el b/lisp/progmodes/compile.el
index 7d9ce41229ce16da2d6e9ad7955311402a66e0fc..d1d42641ea3071c01884591a644b1874fe863cf9 100644 (file)
--- a/lisp/progmodes/compile.el
+++ b/lisp/progmodes/compile.el
@@ -397,7 +397,7 @@ be added."
 (defvar compilation-directory-matcher
   '("\\(?:Entering\\|Leavin\\(g\\)\\) directory `\\(.+\\)'$" (2 . 1))
   "A list for tracking when directories are entered or left.
-Nil means not to track directories, e.g. if all file names are absolute.  The
+nil means not to track directories, e.g. if all file names are absolute.  The
 first element is the REGEXP matching these messages.  It can match any number
 of variants, e.g. different languages.  The remaining elements are all of the
 form (DIR .  LEAVE).  If for any one of these the DIR'th subexpression