Fix comments as suggested in review

Author: erichkeane

clang/lib/AST/StmtOpenACC.cpp

@@ -347,7 +347,7 @@ OpenACCAtomicConstruct::getAssociatedStmtInfo() const {
   case OpenACCAtomicKind::None:
   case OpenACCAtomicKind::Update:
   case OpenACCAtomicKind::Capture:
-    assert(false && "Only 'read'/'write' has been implemented here");
+    assert(false && "Only 'read'/'write' have been implemented here");
     return {};
   case OpenACCAtomicKind::Read: {
     // Read only supports the format 'v = x'; where both sides are a scalar

clang/lib/CIR/CodeGen/CIRGenStmtOpenACC.cpp

@@ -307,7 +307,7 @@ CIRGenFunction::emitOpenACCCacheConstruct(const OpenACCCacheConstruct &s) {
 mlir::LogicalResult
 CIRGenFunction::emitOpenACCAtomicConstruct(const OpenACCAtomicConstruct &s) {
   // For now, we are only support 'read'/'write', so diagnose. We can switch on
-  // the kind later once we start implementing the other 3 forms. While we
+  // the kind later once we start implementing the other 2 forms. While we
   if (s.getAtomicKind() != OpenACCAtomicKind::Read &&
       s.getAtomicKind() != OpenACCAtomicKind::Write) {
     cgm.errorNYI(s.getSourceRange(), "OpenACC Atomic Construct");