Fix command line quoting for Windows (#169)

codecov/__init__.py

@@ -27,10 +27,22 @@
 except ImportError:  # pragma: no cover
     from urllib import urlencode
 
-try:
-    from shlex import quote
-except ImportError:  # pragma: no cover
-    from pipes import quote
+quote = None
+if sys.platform == 'win32':  # pragma: no cover
+    try:
+        # https://github.com/python/cpython/blob/3.7/Lib/subprocess.py#L174-L175
+        from subprocess import list2cmdline
+
+        def quote(arg):
+            return list2cmdline([arg])
+    except ImportError:
+        pass
+
+if quote is None:
+    try:
+        from shlex import quote
+    except ImportError:  # pragma: no cover
+        from pipes import quote
 
 import subprocess