clang: Fix typo in comment

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@369539 91177308-0d34-0410-b5e6-96231b3b80d8

lib/Lex/UnicodeCharSets.h

@@ -215,7 +215,7 @@ static const llvm::sys::UnicodeCharRange C99AllowedIDCharRanges[] = {
   // Digits (2)
   { 0x06F0, 0x06F9 },
 
-  // Devanagari and Special characeter 0x093D.
+  // Devanagari and Special character 0x093D.
   { 0x0901, 0x0903 }, { 0x0905, 0x0939 }, { 0x093D, 0x094D },
   { 0x0950, 0x0952 }, { 0x0958, 0x0963 },