Fix diagnostic to use proper grammar.

Author: gottesmm

include/swift/AST/DiagnosticsSIL.def

@@ -741,7 +741,7 @@ NOTE(sil_movekillscopyablevalue_use_here, none,
 NOTE(sil_movekillscopyablevalue_value_consumed_in_loop, none,
      "cyclic move here. move will occur multiple times in the loop", ())
 ERROR(sil_movekillscopyablevalue_move_applied_to_unsupported_move, none,
-      "_move applied to value that the compiler does not supporting checking.",
+      "_move applied to value that the compiler does not support checking",
       ())
 
 #define UNDEFINE_DIAGNOSTIC_MACROS

test/SILOptimizer/move_operator_kills_copyable_addresses.swift

@@ -144,7 +144,7 @@ public func conditionalBadConsumingUseLoop2<T>(_ x: T) {
 
 // This is ok, no uses after.
 public func simpleMoveOfParameter<T>(_ x: T) -> () {
-    let _ = _move(x) // expected-error {{_move applied to value that the compiler does not know how to check}}
+    let _ = _move(x) // expected-error {{_move applied to value that the compiler does not support checking}}
 }
 
 public func simpleMoveOfOwnedParameter<T>(_ x: __owned T) -> () {
@@ -269,12 +269,12 @@ public class TPair<T> {
 // TODO: Emit a better error here! We should state that we are applying _move to
 // a class field and that is illegal.
 public func performMoveOnOneEltOfTPair<T>(_ p: TPair<T>) {
-    let _ = _move(p.x) // expected-error {{_move applied to value that the compiler does not know how to check. Please file a bug or an enhancement request!}}
+    let _ = _move(p.x) // expected-error {{_move applied to value that the compiler does not support checking}}
     nonConsumingUse(p.y)
 }
 
 public func performMoveOnOneEltOfTPair2<T>(_ p: __owned TPair<T>) {
-    let _ = _move(p.x) // expected-error {{_move applied to value that the compiler does not know how to check. Please file a bug or an enhancement request!}}
+    let _ = _move(p.x) // expected-error {{_move applied to value that the compiler does not support checking}}
     nonConsumingUse(p.y)
 }
 
@@ -284,7 +284,7 @@ public func performMoveOnOneEltOfTPair2<T>(_ p: __owned TPair<T>) {
 
 public func performMoveOnVar<T>(_ p: T) {
     var x = p
-    let _ = _move(x)
+    let _ = _move(x) // expected-error {{_move applied to value that the compiler does not support checking}}
     x = p
     nonConsumingUse(x)
 }

test/SILOptimizer/move_operator_kills_copyable_values.swift

@@ -234,24 +234,24 @@ public class KlassPair {
 // TODO: Emit a better error here! We should state that we are applying _move to
 // a class field and that is illegal.
 public func performMoveOnOneEltOfKlassPair(_ p: KlassPair) {
-    let _ = _move(p.x) // expected-error {{_move applied to value that the compiler does not supporting checking.}}
+    let _ = _move(p.x) // expected-error {{_move applied to value that the compiler does not support checking}}
     nonConsumingUse(p.y)
 }
 
 let myLetGlobal = Klass()
 var myVarGlobal = Klass()
 
 public func performMoveOnVarGlobalError() {
-    let _ = _move(myVarGlobal) // expected-error {{_move applied to value that the compiler does not supporting checking.}}
+    let _ = _move(myVarGlobal) // expected-error {{_move applied to value that the compiler does not support checking}}
 }
 
 // TODO: Support vars
 public func performMoveOnVarError() {
     var k = myVarGlobal
-    let _ = _move(k) // expected-error {{_move applied to value that the compiler does not supporting checking.}}
+    let _ = _move(k) // expected-error {{_move applied to value that the compiler does not support checking}}
     k = myVarGlobal
 }
 
 public func performMoveOnLetGlobalError() {
-    let _ = _move(myVarGlobal) // expected-error {{_move applied to value that the compiler does not supporting checking.}}
+    let _ = _move(myVarGlobal) // expected-error {{_move applied to value that the compiler does not support checking}}
 }