Convert raise statements in Lib/plat-{mac,os2emx}.
diff --git a/Lib/plat-mac/MiniAEFrame.py b/Lib/plat-mac/MiniAEFrame.py
index 7ae3351..8e551a5 100644
--- a/Lib/plat-mac/MiniAEFrame.py
+++ b/Lib/plat-mac/MiniAEFrame.py
@@ -79,7 +79,7 @@
             c = chr(message & charCodeMask)
             if modifiers & cmdKey:
                 if c == '.':
-                    raise KeyboardInterrupt, "Command-period"
+                    raise KeyboardInterrupt("Command-period")
                 if c == 'q':
                     if hasattr(MacOS, 'OutputSeen'):
                         MacOS.OutputSeen()