Update tests to expect hyphens

Click now converts underscores to hyphens in command names, so
update test expectations to match.

Author: theazureshadow

tests/test_argument.py

@@ -14,6 +14,6 @@ def arg_cmd():
         pass
 
     c = ClickCompleter(root_command)
-    completions = list(c.get_completions(Document(u"arg_cmd ")))
+    completions = list(c.get_completions(Document(u"arg-cmd ")))
 
     assert set(x.text for x in completions) == set([u"foo", u"bar"])

tests/test_basic.py

@@ -21,8 +21,8 @@ def second_level_command_two():
         pass
 
     c = ClickCompleter(root_command)
-    completions = list(c.get_completions(Document(u"first_level_command ")))
+    completions = list(c.get_completions(Document(u"first-level-command ")))
 
     assert set(x.text for x in completions) == set(
-        [u"second_level_command_one", u"second_level_command_two"]
+        [u"second-level-command-one", u"second-level-command-two"]
     )

tests/test_command_collection.py

@@ -24,4 +24,4 @@ def foobar_cmd():
     c = ClickCompleter(click.CommandCollection(sources=[foo_group, foobar_group]))
     completions = list(c.get_completions(Document(u"foo")))
 
-    assert set(x.text for x in completions) == set([u"foo_cmd", u"foobar_cmd"])
+    assert set(x.text for x in completions) == set([u"foo-cmd", u"foobar-cmd"])