config.txt: Make configuration paragraph more consistent

By renaming 'information' to 'configuration' we capture more clearly
what a configuration file holds.

Signed-off-by: Stephen Boyd <bebarino@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

Documentation/config.txt

@@ -3,10 +3,10 @@ CONFIGURATION FILE
 
 The git configuration file contains a number of variables that affect
 the git command's behavior. The `.git/config` file in each repository
-is used to store the information for that repository, and
-`$HOME/.gitconfig` is used to store per user information as
+is used to store the configuration for that repository, and
+`$HOME/.gitconfig` is used to store a per-user configuration as
 fallback values for the `.git/config` file. The file `/etc/gitconfig`
-can be used to store system-wide defaults.
+can be used to store a system-wide default configuration.
 
 The configuration variables are used by both the git plumbing
 and the porcelains. The variables are divided into sections, wherein