[NFC] Fixing minor comments that should be docs and minor call

Author: LucianoPAlmeida

lib/Sema/CSDiagnostics.cpp

@@ -4620,9 +4620,7 @@ bool InaccessibleMemberFailure::diagnoseAsError() {
     auto &cs = getConstraintSystem();
     auto *locator =
         cs.getConstraintLocator(baseExpr, ConstraintLocator::Member);
-    if (llvm::any_of(cs.getFixes(), [&](const ConstraintFix *fix) {
-          return fix->getLocator() == locator;
-        }))
+    if (cs.hasFixFor(locator))
       return false;
   }
 

lib/Sema/CSDiagnostics.h

@@ -558,8 +558,8 @@ class ContextualFailure : public FailureDiagnostic {
   /// Diagnose failed conversion in a `CoerceExpr`.
   bool diagnoseCoercionToUnrelatedType() const;
 
-  // If we're trying to convert something of type "() -> T" to T,
-  // then we probably meant to call the value.
+  /// If we're trying to convert something of type "() -> T" to T,
+  /// then we probably meant to call the value.
   bool diagnoseMissingFunctionCall() const;
 
   /// Produce a specialized diagnostic if this is an invalid conversion to Bool.
@@ -1376,11 +1376,11 @@ class MutatingMemberRefOnImmutableBase final : public FailureDiagnostic {
   bool diagnoseAsError() override;
 };
 
-// Diagnose an attempt to use AnyObject as the root type of a KeyPath
-//
-// ```swift
-// let keyPath = \AnyObject.bar
-// ```
+/// Diagnose an attempt to use AnyObject as the root type of a KeyPath
+///
+/// ```swift
+/// let keyPath = \AnyObject.bar
+/// ```
 class AnyObjectKeyPathRootFailure final : public FailureDiagnostic {
 
 public: