Comment typo/cleanup.

Author: atrick

lib/SILOptimizer/Mandatory/GuaranteedARCOpts.cpp

@@ -206,8 +206,8 @@ bool GuaranteedARCOptsVisitor::visitReleaseValueInst(ReleaseValueInst *RVI) {
 namespace {
 
 // Even though this is a mandatory pass, it is rerun after deserialization in
-// cast DiagnosticConstantPropagation exposed anything new in this assert
-// configutation.
+// case DiagnosticConstantPropagation exposed anything new in this assert
+// configuration.
 struct GuaranteedARCOpts : SILFunctionTransform {
   void run() override {
     GuaranteedARCOptsVisitor Visitor;

lib/SILOptimizer/Mandatory/SemanticARCOpts.cpp

@@ -141,6 +141,9 @@ static bool optimizeGuaranteedArgument(SILArgument *Arg,
 
 namespace {
 
+// Even though this is a mandatory pass, it is rerun after deserialization in
+// case DiagnosticConstantPropagation exposed anything new in this assert
+// configuration.
 struct SemanticARCOpts : SILFunctionTransform {
   void run() override {
     bool MadeChange = false;