Fix spelling.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@116804 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/MC/MCParser/DarwinAsmParser.cpp b/lib/MC/MCParser/DarwinAsmParser.cpp
index 54ddb44..44f2345 100644
--- a/lib/MC/MCParser/DarwinAsmParser.cpp
+++ b/lib/MC/MCParser/DarwinAsmParser.cpp
@@ -305,7 +305,7 @@
   //
   // FIXME: This isn't really what 'as' does; I think it just uses the implicit
   // alignment on the section (e.g., if one manually inserts bytes into the
-  // section, then just issueing the section switch directive will not realign
+  // section, then just issuing the section switch directive will not realign
   // the section. However, this is arguably more reasonable behavior, and there
   // is no good reason for someone to intentionally emit incorrectly sized
   // values into the implicitly aligned sections.