--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,10 @@
+2011-04-27  Eric Blake  <eblake@redhat.com>
+
+	getcwd: tweak comments
+	* m4/getcwd-abort-bug.m4: Fix comments.
+	* m4/getcwd-path-max.m4: Likewise.
+	* m4/getcwd.m4: Likewise.
+
 2011-04-27  Reuben Thomas  <rrt@sc3d.org>
 	and Eric Blake  <eblake@redhat.com>
 

--- a/m4/getcwd-abort-bug.m4
+++ b/m4/getcwd-abort-bug.m4
@@ -1,4 +1,4 @@
-# serial 2
+# serial 3
 # Determine whether getcwd aborts when the length of the working directory
 # name is unusually large.  Any length between 4k and 16k trigger the bug
 # when using glibc-2.4.90-9 or older.
@@ -58,7 +58,7 @@
   size_t d;
 
   /* The bug is triggered when PATH_MAX < getpagesize (), so skip
-     this relative expensive and invasive test if that's not true.  */
+     this relatively expensive and invasive test if that's not true.  */
   if (getpagesize () <= PATH_MAX)
     return 0;
 

--- a/m4/getcwd-path-max.m4
+++ b/m4/getcwd-path-max.m4
@@ -1,10 +1,10 @@
-# serial 15
+# serial 16
 # Check for several getcwd bugs with long file names.
 # If so, arrange to compile the wrapper function.
 
 # This is necessary for at least GNU libc on linux-2.4.19 and 2.4.20.
 # I've heard that this is due to a Linux kernel bug, and that it has
-# been fixed between 2.4.21-pre3 and 2.4.21-pre4.  */
+# been fixed between 2.4.21-pre3 and 2.4.21-pre4.
 
 # Copyright (C) 2003-2007, 2009-2011 Free Software Foundation, Inc.
 # This file is free software; the Free Software Foundation

--- a/m4/getcwd.m4
+++ b/m4/getcwd.m4
@@ -6,7 +6,7 @@
 # with or without modifications, as long as this notice is preserved.
 
 # Written by Paul Eggert.
-# serial 3
+# serial 4
 
 AC_DEFUN([gl_FUNC_GETCWD_NULL],
   [
@@ -52,6 +52,8 @@
         ]])])
 ])
 
+dnl Check for all known getcwd bugs; useful for a program likely to be
+dnl executed from an arbitrary location.
 AC_DEFUN([gl_FUNC_GETCWD],
 [
   AC_REQUIRE([gl_UNISTD_H_DEFAULTS])