main: fix up help printing

We are getting an extra newline at the end of our help, which is
inconsistent with how argparse usually works and is causing tox issues
on Windows.

Avoid having an empty line at the end of help messages.

Signed-off-by: Martí Bolívar <marti.bolivar@nordicsemi.no>

src/west/main.py

@@ -65,7 +65,7 @@ class WestArgumentParser(argparse.ArgumentParser):
         self.mve = None # a ManifestVersionError, if any
 
     def print_help(self, file=None, top_level=False):
-        print(self.format_help(top_level=top_level),
+        print(self.format_help(top_level=top_level), end='',
               file=file or sys.stdout)
 
     def format_help(self, top_level=False):
@@ -153,7 +153,7 @@ class WestArgumentParser(argparse.ArgumentParser):
             if self.epilog:
                 append(self.epilog)
 
-            return sio.getvalue().rstrip()
+            return sio.getvalue()
 
     def format_west_optional(self, append, wo, width):
         metavar = wo['metavar']

tests/test_help.py

@@ -34,5 +34,4 @@ usage: west test-extension [-h]
 
 optional arguments:
   -h, --help  show this help message and exit
-
 '''