Merge branch 'jk/config-no-ungetc-eof'

Reading configuration from a blob object, when it ends with a lone
CR, use to confuse the configuration parser.

* jk/config-no-ungetc-eof:
  config_buf_ungetc: warn when pushing back a random character
  config: do not ungetc EOF

t/t1307-config-blob.sh

@@ -67,4 +67,13 @@ test_expect_success 'parse errors in blobs are properly attributed' '
 	grep "HEAD:config" err
 '
 
+test_expect_success 'can parse blob ending with CR' '
+	printf "[some]key = value\\r" >config &&
+	git add config &&
+	git commit -m CR &&
+	echo value >expect &&
+	git config --blob=HEAD:config some.key >actual &&
+	test_cmp expect actual
+'
+
 test_done