Fix whitepaper typo

Reviewed By: ditka


git-svn-id: https://svn.apache.org/repos/asf/incubator/thrift/trunk@665080 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/doc/thrift.tex b/doc/thrift.tex
index ce6a2e6..cb7582f 100644
--- a/doc/thrift.tex
+++ b/doc/thrift.tex
@@ -891,8 +891,7 @@
 object may need to know which thread it is executing in and a Thread, obviously,
 needs to know what \texttt{Runnable} object it is hosting. This interdependency is
 further complicated because the lifecycle of each object is independent of the
-other. An application may create a set of \texttt{Runnable} object to be used overs
-and over in different threads, or it may create and forget a \texttt{Runnable} object
+other. An application may create a set of \texttt{Runnable} object to be reused in different threads, or it may create and forget a \texttt{Runnable} object
 once a thread has been created and started for it. 
 
 The \texttt{Thread} class takes a \texttt{boost::shared\_ptr} reference to the hosted