[NFC] Adjusting comments for clarity

Author: LucianoPAlmeida

lib/Sema/CSDiagnostics.cpp

@@ -2953,9 +2953,9 @@ bool ContextualFailure::tryTypeCoercionFixIt(
   if (!toType->hasTypeRepr())
     return false;
 
-  // If optional unwrapped type is a subtype of the specified contextual type,
-  // let's suggest a force unwrap "!". Otherwise fallback to potential coercion
-  // or force cast.
+  // If object of the optional type is a subtype of the specified contextual
+  // type, let's suggest a force unwrap "!". Otherwise fallback to potential
+  // coercion or force cast.
   if (!bothOptional && fromType->getOptionalObjectType()) {
     if (TypeChecker::isSubtypeOf(fromType->lookThroughAllOptionalTypes(),
                                  toType, getDC())) {

lib/Sema/CSSimplify.cpp

@@ -6735,7 +6735,7 @@ static ConstraintFix *maybeWarnAboutExtraneousCast(
   // we need to store the difference as a signed integer.
   int extraOptionals = fromOptionals.size() - toOptionals.size();
 
-  // From expression could be a type variable with a value to optional
+  // "from" expression could be a type variable with value-to-optional
   // restrictions that we have to account for optionality mismatch.
   const auto subExprType = cs.getType(castExpr->getSubExpr());
   if (llvm::any_of(constraintRestrictions, [&](auto &entry) {