Fix a few typos and a double semicolon.  Patch by Eitan Adler.
diff --git a/Tools/gdb/libpython.py b/Tools/gdb/libpython.py
index 368a7d5..cab226e 100644
--- a/Tools/gdb/libpython.py
+++ b/Tools/gdb/libpython.py
@@ -1463,7 +1463,7 @@
             return name.startswith('pthread_cond_timedwait')
 
     def is_gc_collect(self):
-        '''Is this frame "collect" within the the garbage-collector?'''
+        '''Is this frame "collect" within the garbage-collector?'''
         return self._gdbframe.name() == 'collect'
 
     def get_pyop(self):