minor improvements

gamestonk_terminal/options/chains_view.py

@@ -88,7 +88,9 @@ def get_option_chains(symbol: str, expiry: str) -> pd.DataFrame:
 def display_chains(symbol: str, expiry: str, other_args: List[str]):
 
     parser = argparse.ArgumentParser(
-        prog="chains", add_help=False, description="Display options chains"
+        prog="chains",
+        add_help=False,
+        description="Display option chains [Source: Tradier]",
     )
 
     parser.add_argument(

gamestonk_terminal/options/op_controller.py

@@ -38,7 +38,7 @@ class OptionsController:
         parser = argparse.ArgumentParser(
             add_help=False,
             prog="exp",
-            description="""See expiry dates.""",
+            description="""See/set expiry dates. [Source: Yahoo Finance]""",
         )
         parser.add_argument(
             "-d",