strbuf: miniscule style fix

We write one SP on each side of an operator, even inside an [] pair
that computes the array index.

Signed-off-by: Junio C Hamano <gitster@pobox.com>

strbuf.c

@@ -505,8 +505,8 @@ int strbuf_getline(struct strbuf *sb, FILE *fp, int term)
 {
 	if (strbuf_getwholeline(sb, fp, term))
 		return EOF;
-	if (sb->buf[sb->len-1] == term)
-		strbuf_setlen(sb, sb->len-1);
+	if (sb->buf[sb->len - 1] == term)
+		strbuf_setlen(sb, sb->len - 1);
 	return 0;
 }