the files default needs to be an empty string

Signed-off-by: vsoch <vsochat@stanford.edu>

Author: vsoch

CHANGELOG.md

@@ -12,6 +12,7 @@ and **Merged pull requests**. Critical items to know are:
 Referenced versions in headers are tagged on Github, in parentheses are for pypi.
 
 ## [vxx](https://github.com/urlstechie/urlschecker-python/tree/master) (master)
+ - default for files needs to be empty string (not None) (0.0.17)
  - bug with incorrect return code on fail, add files flag (0.0.16)
  - reverting back to working client (0.0.15)
  - removing unused file variable (0.0.13)

urlchecker/client/__init__.py

@@ -103,7 +103,7 @@ def get_parser():
         "--files",
         dest="files",
         help="comma separated list of exact files or patterns to check.",
-        default=None,
+        default="",
     )
 
     # White listing

urlchecker/version.py

@@ -7,7 +7,7 @@
 
 """
 
-__version__ = "0.0.16"
+__version__ = "0.0.17"
 AUTHOR = "Ayoub Malek, Vanessa Sochat"
 AUTHOR_EMAIL = "superkogito@gmail.com, vsochat@stanford.edu"
 NAME = "urlchecker"