Fix spelling/grammar errors found by Duncan.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@145250 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/docs/CodeGenerator.html b/docs/CodeGenerator.html
index f1f862c..c2ed047 100644
--- a/docs/CodeGenerator.html
+++ b/docs/CodeGenerator.html
@@ -2428,8 +2428,8 @@
 is compatible with the <a href="http://gcc.gnu.org/wiki/SplitStacks">gcc
 implementation</a> used by the Go front end.</p>
 
-<p id="feat_segstacks_x86">Basic support exits on the X86 backend. Currently
-vararg don't work and the object files are not marked the way the gold
+<p id="feat_segstacks_x86">Basic support exists on the X86 backend. Currently
+vararg doesn't work and the object files are not marked the way the gold
 linker expects, but simple Go program can be built by dragonegg.</p>
 
 </div>