git-name-rev: don't use printf without format

printf() without an explicit format string is not a good coding practise,
unless the printed string is guaranteed to not contain percent signs.  While
fixing this, we might as well combine the calls to fwrite() and printf().
Signed-off-by: NRene Scharfe <rene.scharfe@lsrfire.ath.cx>
Signed-off-by: NJunio C Hamano <gitster@pobox.com>

builtin-name-rev.c

@@ -189,6 +189,7 @@ static void name_rev_line(char *p, struct name_ref_data *data)
 			unsigned char sha1[40];
 			const char *name = NULL;
 			char c = *(p+1);
+			int p_len = p - p_start + 1;
 
 			forty = 0;
 
@@ -204,13 +205,10 @@ static void name_rev_line(char *p, struct name_ref_data *data)
 			if (!name)
 				continue;
 
-			if (data->name_only) {
-				fwrite(p_start, p - p_start + 1 - 40, 1, stdout);
-				printf(name);
-			} else {
-				fwrite(p_start, p - p_start + 1, 1, stdout);
-				printf(" (%s)", name);
-			}
+			if (data->name_only)
+				printf("%.*s%s", p_len - 40, p_start, name);
+			else
+				printf("%.*s (%s)", p_len, p_start, name);
 			p_start = p + 1;
 		}
 	}