Fix a typo in the documentation. Thanks to Diana Vasile for the patch

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@191752 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/CodeGenerator.rst b/docs/CodeGenerator.rst
index 1f2dc6c..a1fec81 100644
--- a/docs/CodeGenerator.rst
+++ b/docs/CodeGenerator.rst
@@ -1614,7 +1614,7 @@
 ===============================
 
 Though you're probably reading this because you want to write or maintain a
-compiler backend, LLVM also fully supports building a native assemblers too.
+compiler backend, LLVM also fully supports building a native assembler.
 We've tried hard to automate the generation of the assembler from the .td files
 (in particular the instruction syntax and encodings), which means that a large
 part of the manual and repetitive data entry can be factored and shared with the