Fix mypy warning about short_help using __doc__

Several click.command use __doc__ for the short_help but mypy is getting
confused because its type is a union between str and unicode due to
changes between Python2 and Python3. This commit clarifies to Mypy that
it is a string by calling str on __doc__.

Reviewed By: danilaml

Differential Revision: https://reviews.llvm.org/D95067

Author: Thomas Preud'homme

lnt/tests/compile.py

@@ -993,7 +993,7 @@ def file_log_handler(path):
 # FIXME: an equivalent to argparse's add_argument_group is not implemented
 #        on click. Need to review it when such functionality is available.
 #        https://github.com/pallets/click/issues/373
-@click.command("compile", help=usage_info, short_help=__doc__)
+@click.command("compile", help=usage_info, short_help=str(__doc__))
 @click.argument("label", default=platform.uname()[1], required=False,
                 type=click.UNPROCESSED)
 @click.option("-s", "--sandbox", "sandbox_path", required=True,

lnt/tests/nt.py

@@ -1842,7 +1842,7 @@ def _tools_check():
 # FIXME: an equivalent to argparse's add_argument_group is not implemented
 #        on click. Need to review it when such functionality is available.
 #        https://github.com/pallets/click/issues/373
-@click.command("nt", help=usage_info, short_help=__doc__)
+@click.command("nt", help=usage_info, short_help=str(__doc__))
 @click.argument("label", default=platform.uname()[1], required=False,
                 type=click.UNPROCESSED)
 #  Sandbox

lnt/tests/test_suite.py

@@ -1024,7 +1024,7 @@ def diagnose(self):
         return lnt.util.ImportData.no_submit()
 
 
-@click.command("test-suite", short_help=__doc__)
+@click.command("test-suite", short_help=str(__doc__))
 @click.argument("label", default=platform.uname()[1], required=False,
                 type=click.UNPROCESSED)
 # Sandbox options