Fix various typos in several files.

All are in comments and docstrings, and none should be controversial
in any way (e.g. British versus American spelling).

evennia/commands/default/building.py

@@ -1071,7 +1071,7 @@ class CmdTunnel(COMMAND_DEFAULT_CLASS):
         exitname, backshort = self.directions[exitshort]
         backname = self.directions[backshort][0]
 
-        # if we recieved a typeclass for the exit, add it to the alias(short name)
+        # if we received a typeclass for the exit, add it to the alias(short name)
         if ":" in self.lhs:
             # limit to only the first : character
             exit_typeclass = ":" + self.lhs.split(":", 1)[-1]
@@ -1665,7 +1665,7 @@ class CmdSetAttribute(ObjManipCommand):
     def split_nested_attr(self, attr):
         """
         Yields tuples of (possible attr name, nested keys on that attr).
-        For performance, this is biased to the deepest match, but allows compatability
+        For performance, this is biased to the deepest match, but allows compatibility
         with older attrs that might have been named with `[]`'s.
 
         > list(split_nested_attr("nested['asdf'][0]"))
@@ -4031,7 +4031,7 @@ class CmdSpawn(COMMAND_DEFAULT_CLASS):
                 )
                 return
             try:
-                # we homogenize the protoype first, to be more lenient with free-form
+                # we homogenize the prototype first, to be more lenient with free-form
                 protlib.validate_prototype(protlib.homogenize_prototype(prototype))
             except RuntimeError as err:
                 self.caller.msg(str(err))

evennia/commands/default/comms.py

@@ -1818,7 +1818,7 @@ class CmdRSS2Chan(COMMAND_DEFAULT_CLASS):
 
 class CmdGrapevine2Chan(COMMAND_DEFAULT_CLASS):
     """
-    Link an Evennia channel to an exteral Grapevine channel
+    Link an Evennia channel to an external Grapevine channel
 
     Usage:
       grapevine2chan[/switches] <evennia_channel> = <grapevine_channel>

evennia/commands/default/help.py

@@ -138,7 +138,7 @@ class CmdHelp(COMMAND_DEFAULT_CLASS):
         click_topics=True,
     ):
         """This visually formats the help entry.
-        This method can be overriden to customize the way a help
+        This method can be overridden to customize the way a help
         entry is displayed.
 
         Args: