Fix test: expected help output.

The changed test could fail if the wordlist dir was relatively short.

tests/exp_help_output.txt

@@ -21,5 +21,4 @@ optional arguments:
                         `realdice', `system'. Default: system
   --version             output version information and exit.
 
-Wordlists are stored in
-<PATH-TO-WORDLISTS-DIR>
+Wordlists are stored in <WORDLISTS-DIR>

tests/test_diceware.py

@@ -206,7 +206,8 @@ class TestDicewareModule(object):
             os.path.dirname(__file__), 'exp_help_output.txt')
         with open(expected_path, 'r') as fd:
             expected_output = fd.read()
-        out = out.replace(WORDLISTS_DIR, "<PATH-TO-WORDLISTS-DIR>")
+        out = out.replace(WORDLISTS_DIR, "<WORDLISTS-DIR>")
+        out = out.replace("\n<WORDLISTS-DIR>", " <WORDLISTS-DIR>")
         assert out == expected_output
 
     def test_main_version(self, argv_handler, capsys):