Fix argument parser description in multissltests.py

Author: zware

Tools/ssl/multissltests.py

@@ -75,8 +75,7 @@
 parser = argparse.ArgumentParser(
     prog='multissl',
     description=(
-        "Run CPython tests with multiple cryptography libraries"
-        "versions."
+        "Run CPython tests with multiple cryptography libraries versions."
     ),
 )
 parser.add_argument(