Why does autoupdate remove spaces after commas in AC_INIT only?

[Matthieu Poullet]

Hello,

I've just updated a bunch of configure.ac with autoupdate 2.69 and it
removes all spaces after commas in the AC_INIT macro and only in this
macro, e.g.

diff --git a/flaim-ch8-10/configure.ac b/flaim-ch8-10/configure.ac
index baa0a1c..a724bbc 100644
--- a/flaim-ch8-10/configure.ac
+++ b/flaim-ch8-10/configure.ac
@@ -1,8 +1,8 @@
 #                                               -*- Autoconf -*-
 # Process this file with autoconf to produce a configure script.

-AC_PREREQ([2.62])
-AC_INIT([flaim-projects], [1.0])
+AC_PREREQ([2.69])
+AC_INIT([flaim-projects],[1.0])
 AM_INIT_AUTOMAKE([-Wall -Werror foreign])
 LT_PREREQ([2.2])
 LT_INIT([dlopen])

So my questions are:
- is it a bug?
- is it a feature/a best practice? if yes, does it mean that autoconf
recommends not using spaces after commas and why does it not touch the
other macros then?

Regards,
Matthieu Poullet.