Clean up ModifiedInterpreter.runcode() structure

Lib/idlelib/PyShell.py

@@ -706,7 +706,6 @@ class ModifiedInterpreter(InteractiveInterpreter):
         debugger = self.debugger
         try:
             self.tkconsole.beginexecuting()
-            try:
             if not debugger and self.rpcclt is not None:
                 self.active_seq = self.rpcclt.asyncqueue("exec", "runcode",
                                                         (code,), {})
@@ -728,13 +727,16 @@ class ModifiedInterpreter(InteractiveInterpreter):
                 raise
         except:
             if use_subprocess:
-                    # When run w/o subprocess, both user and IDLE errors
-                    # are printed here; skip message in that case.
-                    print >> self.tkconsole.stderr, \
+                print >>self.tkconsole.stderr, \
                          "IDLE internal error in runcode()"
                 self.showtraceback()
-                if use_subprocess:
                 self.tkconsole.endexecuting()
+            else:
+                if self.tkconsole.canceled:
+                    self.tkconsole.canceled = False
+                    print >>self.tkconsole.stderr, "KeyboardInterrupt"
+                else:
+                    self.showtraceback()
         finally:
             if not use_subprocess:
                 try: