Fix "quote" misconversion for rewrite diff output.

663af3422a (Full rework of
quote_c_style and write_name_quoted.) mistakenly used puts()
when writing out a fixed string when it did not want to add a
terminating LF.

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

diff.c

@@ -2716,7 +2716,7 @@ static void diff_summary(struct diff_filepair *p)
 		break;
 	default:
 		if (p->score) {
-			puts(" rewrite ");
+			fputs(" rewrite ", stdout);
 			write_name_quoted(p->two->path, stdout, ' ');
 			printf("(%d%%)\n", similarity_index(p));
 		}

t/t4022-diff-rewrite.sh

@@ -0,0 +1,26 @@
+#!/bin/sh
+
+test_description='rewrite diff'
+
+. ./test-lib.sh
+
+test_expect_success setup '
+
+	cat ../../COPYING >test &&
+	git add test &&
+	tr 'a-zA-Z' 'n-za-mN-ZA-M' <../../COPYING >test
+
+'
+
+test_expect_success 'detect rewrite' '
+
+	actual=$(git diff-files -B --summary test) &&
+	expr "$actual" : " rewrite test ([0-9]*%)$" || {
+		echo "Eh? <<$actual>>"
+		false
+	}
+
+'
+
+test_done
+