Typo fix in Ticker API

Author: adamjstewart

doc/devel/MEP/MEP24.rst

@@ -31,7 +31,7 @@ but this seems more generally useful (for example growth rate as a
 function of angle).  The assumption in the current code (as I
 understand it) is that the center of the graph is `r==0`, however it
 would be good to be able to set the center to be at any `r` (with any
-value less than the off set clipped).
+value less than the offset clipped).
 
 Implementation
 ==============

lib/matplotlib/ticker.py

@@ -12,8 +12,8 @@
 -----------------
 
 The default formatter identifies when the x-data being plotted is a
-small range on top of a large off set. To reduce the chances that the
-ticklabels overlap the ticks are labeled as deltas from a fixed offset.
+small range on top of a large offset. To reduce the chances that the
+ticklabels overlap, the ticks are labeled as deltas from a fixed offset.
 For example::
 
    ax.plot(np.arange(2000, 2010), range(10))