[NFC] fix trivial typos in documents

llvm-svn: 334799
diff --git a/llvm/docs/ProgrammersManual.rst b/llvm/docs/ProgrammersManual.rst
index 9ce64ab..198225d 100644
--- a/llvm/docs/ProgrammersManual.rst
+++ b/llvm/docs/ProgrammersManual.rst
@@ -3721,7 +3721,7 @@
 
 * ``CmpInst``
 
-  This subclass respresents the two comparison instructions,
+  This subclass represents the two comparison instructions,
   `ICmpInst <LangRef.html#i_icmp>`_ (integer opreands), and
   `FCmpInst <LangRef.html#i_fcmp>`_ (floating point operands).