[NFC] Minor comment adjustments

Author: LucianoPAlmeida

lib/Sema/CSDiagnostics.cpp

@@ -6227,7 +6227,7 @@ bool CoercionAsForceCastFailure::diagnoseAsError() {
 
 bool KeyPathRootTypeMismatchFailure::diagnoseAsError() {
   auto locator = getLocator();
-  assert(locator->isKeyPathRoot() && "Expect a key path root");
+  assert(locator->isKeyPathRoot() && "Expected a key path root");
 
   auto baseType = getFromType();
   auto rootType = getToType();

lib/Sema/CSDiagnostics.h

@@ -2027,7 +2027,7 @@ class CoercionAsForceCastFailure final : public ContextualFailure {
 /// base that has another type.
 ///
 /// \code
-/// func f (_ bar: Bar , keyPath: KeyPath<Foo, Int> ) {
+/// func f(_ bar: Bar , keyPath: KeyPath<Foo, Int> ) {
 ///   bar[keyPath: keyPath]
 /// }
 /// \endcode

lib/Sema/CSFix.h

@@ -252,7 +252,7 @@ enum class FixKind : uint8_t {
   /// A warning fix that allows a coercion to perform a force-cast.
   AllowCoercionToForceCast,
 
-  /// Allow key path root type mismatch when applying a key path with a 
+  /// Allow key path root type mismatch when applying a key path that has a
   /// root type not convertible to the type of the base instance.
   AllowKeyPathRootTypeMismatch,
 };
@@ -1776,7 +1776,7 @@ class AllowCoercionToForceCast final : public ContextualMismatch {
 /// applied to a base instance of another type.
 ///
 /// \code
-/// func f (_ bar: Bar , keyPath: KeyPath<Foo, Int> ) {
+/// func f(_ bar: Bar , keyPath: KeyPath<Foo, Int> ) {
 ///   bar[keyPath: keyPath]
 /// }
 /// \endcode