Cleaned up KeyErrors and added a funcparser test.

evennia/utils/funcparser.py

@@ -1222,10 +1222,7 @@ def funcparser_callable_you(
     """
     if args and mapping:
         # this would mean a $you(key) form
-        try:
-            caller = mapping.get(args[0])
-        except KeyError:
-            pass
+        caller = mapping.get(args[0], None)
 
     if not (caller and receiver):
         raise ParsingError("No caller or receiver supplied to $you callable.")
@@ -1292,10 +1289,7 @@ def funcparser_callable_your(
     """
     if args and mapping:
         # this would mean a $your(key) form
-        try:
-            caller = mapping.get(args[0])
-        except KeyError:
-            pass
+        caller = mapping.get(args[0], None)
 
     if not (caller and receiver):
         raise ParsingError("No caller or receiver supplied to $your callable.")

evennia/utils/tests/test_funcparser.py

@@ -451,6 +451,11 @@ class TestDefaultCallables(TestCase):
                     "You smile to yourself.",
                     "Char1 smiles to herself.",
             ),  # reverse reference
+            (
+                    "$Your() smile is the greatest ever.",
+                    "Your smile is the greatest ever.",
+                    "Char1's smile is the greatest ever."
+            ),
         ]
     )
     def test_conjugate(self, string, expected_you, expected_them):