git log: don't do merge diffs by default

I personally prefer "ignore_merges" to be on by default, because quite 
often the merge diff is distracting and not interesting. That's true both 
with "-p" and with "--stat" output.

If you want output from merges, you can trivially use the "-m", "-c" or 
"--cc" flags to tell that you're interested in merges, which also tells 
the diff generator what kind of diff to do (for --stat, any of the three 
will do, of course, but they differ for plain patches or for 
--patch-with-stat).

This trivial patch just removes the two lines that tells "git log" not to 
ignore merges. It will still show the commit log message, of course, due 
to the "always_show_header" part.

Signed-off-by: Linus Torvalds <torvalds@osdl.org>
---

diff --git a/git.c b/git.c
index 0be14bb..40b7e42 100644
--- a/git.c
+++ b/git.c

@@ -331,8 +331,6 @@ static int cmd_log(int argc, const char 
 	init_revisions(&rev);
 	rev.always_show_header = 1;
 	rev.diffopt.recursive = 1;
-	rev.combine_merges = 1;
-	rev.ignore_merges = 0;
 	return cmd_log_wc(argc, argv, envp, &rev);
 }