Style fixes, add a space after if/for/while.

The majority of code in core git appears to use a single
space after if/for/while. This is an attempt to bring more
code to this standard. These are entirely cosmetic changes.

Signed-off-by: Brian Gianforcaro <b.gianfo@gmail.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/diff.c b/diff.c
index cd35e0c..e1be189 100644
--- a/diff.c
+++ b/diff.c
@@ -2691,7 +2691,7 @@
 	num = 0;
 	scale = 1;
 	dot = 0;
-	for(;;) {
+	for (;;) {
 		ch = *cp;
 		if ( !dot && ch == '.' ) {
 			scale = 1;