t9902: add completion tests for "odd" filenames

We correctly handle completion items with spaces just fine,
since we pass the lists around with newline delimiters.
However, we do not handle filenames with shell
metacharacters, as "compgen -W" performs expansion on the
list we give it.

Signed-off-by: Jeff King <peff@peff.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>

t/t9902-completion.sh

@@ -269,4 +269,23 @@ test_expect_success '<ref>: completes paths' '
 	EOF
 '
 
+test_expect_success 'complete tree filename with spaces' '
+	echo content >"name with spaces" &&
+	git add . &&
+	git commit -m spaces &&
+	test_completion_long "git show HEAD:nam" <<-\EOF
+	name with spaces_
+	EOF
+'
+
+test_expect_failure 'complete tree filename with metacharacters' '
+	echo content >"name with \${meta}" &&
+	git add . &&
+	git commit -m meta &&
+	test_completion_long "git show HEAD:nam" <<-\EOF
+	name with ${meta}_
+	name with spaces_
+	EOF
+'
+
 test_done