'Hexadecimal' has two 'a's and only one 'i'.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@176031 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/MC/MCParser/AsmLexer.cpp b/lib/MC/MCParser/AsmLexer.cpp
index 530e94e..86a9674 100644
--- a/lib/MC/MCParser/AsmLexer.cpp
+++ b/lib/MC/MCParser/AsmLexer.cpp
@@ -282,7 +282,7 @@
                     (int64_t)Result);
   }
 
-  // Either octal or hexidecimal.
+  // Either octal or hexadecimal.
   long long Value;
   unsigned Radix = doLookAhead(CurPtr, 8);
   bool isHex = Radix == 16;