Remove non-ASCII characters from source

Author: svenvh

llvm-spirv/lib/SPIRV/SPIRVToOCL.h

@@ -150,7 +150,7 @@ class SPIRVToOCL : public ModulePass, public InstVisitor<SPIRVToOCL> {
   std::string getNonUniformArithmeticBuiltinName(CallInst *CI, Op OC);
   /// Transform ballot bit count opcode to corresponding OpenCL function name,
   /// example: GroupNonUniformBallotBitCount(Reduce) =>
-  /// group_ballot_bit_count_iadd => sub_​group_​ballot_​bit_​count
+  /// group_ballot_bit_count_iadd => sub_group_ballot_bit_count
   std::string getBallotBuiltinName(CallInst *CI, Op OC);
   /// Transform group opcode to corresponding OpenCL function name
   std::string groupOCToOCLBuiltinName(CallInst *CI, Op OC);

llvm-spirv/lib/SPIRV/libSPIRV/SPIRVType.cpp

@@ -1,4 +1,4 @@
-//===- SPIRVtype.cpp – Class to represent a SPIR-V type ---------*- C++ -*-===//
+//===- SPIRVtype.cpp - Class to represent a SPIR-V type ---------*- C++ -*-===//
 //
 //                     The LLVM/SPIRV Translator
 //