Replace unsafe characters with "_" in names generated by `@parameterized.expand`

CHANGELOG.txt

@@ -1,3 +1,7 @@
+0.3.3 (2014-01-03)
+    * Replace unsafe characters with "_" in names generated by
+      ``@parameterized.expand``.
+
 0.3.2 (2014-01-02)
     * Add helpful error message when used with old-style classes.
 

nose_parameterized/parameterized.py

@@ -236,4 +236,4 @@ class parameterized(object):
 
     @classmethod
     def to_safe_name(cls, s):
-        return str(re.sub("[^a-zA-Z0-9_]", "", s))
+        return str(re.sub("[^a-zA-Z0-9_]+", "_", s))

setup.py

@@ -9,7 +9,7 @@ os.chdir(os.path.dirname(sys.argv[0]) or ".")
 
 setup(
     name="nose-parameterized",
-    version="0.3.2",
+    version="0.3.3",
     url="https://github.com/wolever/nose-parameterized",
     author="David Wolever",
     author_email="david@wolever.net",