Small docstring/usage message cleanups.

IPython/core/history.py

@@ -693,7 +693,7 b" def magic_history(self, parameter_s = ''):"
 
 
 def magic_rep(self, arg):
-    r""" Repeat a command, or get command to input line for editing
+    r"""Repeat a command, or get command to input line for editing
 
     - %rep (no arguments):
     

IPython/core/usage.py

@@ -26,7 +26,6 b' Tools for Interactive Computing in Python'
 
 
 Usage
------
 
     ipython [subcommand] [options] [files]