From aff0a090ce0c79e7c80c3e5b99042281adab6811 Mon Sep 17 00:00:00 2001
From: Anthony Scopatz <scopatz@gmail.com>
Date: Sun, 25 Sep 2016 15:07:42 -0400
Subject: [PATCH] new path tests

---
 tests/test_path_completers.py | 5 +++++
 xonsh/completers/path.py      | 2 +-
 2 files changed, 6 insertions(+), 1 deletion(-)
 create mode 100644 tests/test_path_completers.py

diff --git a/tests/test_path_completers.py b/tests/test_path_completers.py
new file mode 100644
index 000000000..3b4166a96
--- /dev/null
+++ b/tests/test_path_completers.py
@@ -0,0 +1,5 @@
+import xonsh.completers.path as xcp
+
+def test_pattern_need_quotes():
+    # just make sure the regex compiles
+    xcp.PATTERN_NEED_QUOTES.match('')
diff --git a/xonsh/completers/path.py b/xonsh/completers/path.py
index 2677eb94d..1fadaedcb 100644
--- a/xonsh/completers/path.py
+++ b/xonsh/completers/path.py
@@ -14,7 +14,7 @@ from xonsh.completers.tools import get_filter_function
 def PATTERN_NEED_QUOTES():
     pattern = r'\s`\$\{\}\,\*\(\)"\'\?&'
     if xp.ON_WINDOWS:
-        pattern.append('%')
+        pattern += '%'
     pattern = '[' + pattern + ']' + r'|\band\b|\bor\b'
     return re.compile(pattern)