Fix typo in docs

Patch by Alex Yursha.

Differential Revision: https://reviews.llvm.org/D45903

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@354203 91177308-0d34-0410-b5e6-96231b3b80d8

docs/ProgrammersManual.rst

@@ -2659,7 +2659,7 @@ Iterating over def-use & use-def chains
 
 Frequently, we might have an instance of the ``Value`` class (`doxygen
 <http://llvm.org/doxygen/classllvm_1_1Value.html>`__) and we want to determine
-which ``User`` s use the ``Value``.  The list of all ``User``\ s of a particular
+which ``User``\ s use the ``Value``.  The list of all ``User``\ s of a particular
 ``Value`` is called a *def-use* chain.  For example, let's say we have a
 ``Function*`` named ``F`` to a particular function ``foo``.  Finding all of the
 instructions that *use* ``foo`` is as simple as iterating over the *def-use*