Fix failing tests for hovers/quick info on this (#2676)

Author: DanielRosenwasser

internal/fourslash/_scripts/failingTests.txt

@@ -411,7 +411,6 @@ TestLocalFunction
 TestMemberListInReopenedEnum
 TestMemberListInWithBlock
 TestMemberListOfExportedClass
-TestMemberListOnContextualThis
 TestMultilineCommentBeforeOpenBrace
 TestMultiModuleFundule
 TestNgProxy1
@@ -508,10 +507,7 @@ TestQuickInfoOnPropertyAccessInWriteLocation2
 TestQuickInfoOnPropertyAccessInWriteLocation3
 TestQuickInfoOnPropertyAccessInWriteLocation4
 TestQuickInfoOnPropertyAccessInWriteLocation5
-TestQuickInfoOnThis
-TestQuickInfoOnThis2
 TestQuickInfoOnThis3
-TestQuickInfoOnThis4
 TestQuickInfoOnUndefined
 TestQuickInfoOnVarInArrowExpression
 TestQuickInfoPrivateIdentifierInTypeReferenceNoCrash1
@@ -551,7 +547,6 @@ TestSymbolCompletionLowerPriority
 TestSyntheticImportFromBabelGeneratedFile1
 TestSyntheticImportFromBabelGeneratedFile2
 TestTabbingAfterNewlineInsertedBeforeWhile
-TestThisBindingInLambda
 TestThisPredicateFunctionQuickInfo01
 TestThisPredicateFunctionQuickInfo02
 TestTsxCompletionNonTagLessThan

internal/ls/hover.go

@@ -174,7 +174,7 @@ func formatQuickInfo(quickInfo string) string {
 func getQuickInfoAndDeclarationAtLocation(c *checker.Checker, symbol *ast.Symbol, node *ast.Node) (string, *ast.Node) {
 	container := getContainerNode(node)
 	if node.Kind == ast.KindThisKeyword && ast.IsInExpressionContext(node) || ast.IsThisInTypeQuery(node) {
-		return c.TypeToStringEx(c.GetTypeAtLocation(node), container, typeFormatFlags), nil
+		return "this: " + c.TypeToStringEx(c.GetTypeAtLocation(node), container, typeFormatFlags), nil
 	}
 	if symbol == nil {
 		return "", nil

testdata/baselines/reference/fourslash/quickInfo/quickInfoCommentsClassMembers.baseline

@@ -751,7 +751,7 @@
 //         ^^^^
 // | ----------------------------------------------------------------------
 // | ```tsx
-// | this
+// | this: this
 // | ```
 // | 
 // | ----------------------------------------------------------------------
@@ -3168,7 +3168,7 @@
     "item": {
       "contents": {
         "kind": "markdown",
-        "value": "```tsx\nthis\n```\n"
+        "value": "```tsx\nthis: this\n```\n"
       },
       "range": {
         "start": {

testdata/baselines/reference/fourslash/quickInfo/quickInfoOnThis5.baseline

@@ -7,15 +7,15 @@
 //                         ^^^^
 // | ----------------------------------------------------------------------
 // | ```tsx
-// | { num: number; f(): void; g(this: number): void; }
+// | this: { num: number; f(): void; g(this: number): void; }
 // | ```
 // | 
 // | ----------------------------------------------------------------------
 //         type Z = typeof this.num;
 //                         ^^^^
 // | ----------------------------------------------------------------------
 // | ```tsx
-// | { num: number; f(): void; g(this: number): void; }
+// | this: { num: number; f(): void; g(this: number): void; }
 // | ```
 // | 
 // | ----------------------------------------------------------------------
@@ -25,7 +25,7 @@
 //                         ^^^^
 // | ----------------------------------------------------------------------
 // | ```tsx
-// | number
+// | this: number
 // | ```
 // | 
 // | ----------------------------------------------------------------------
@@ -38,15 +38,15 @@
 //                         ^^^^
 // | ----------------------------------------------------------------------
 // | ```tsx
-// | this
+// | this: this
 // | ```
 // | 
 // | ----------------------------------------------------------------------
 //         type Z = typeof this.num;
 //                         ^^^^
 // | ----------------------------------------------------------------------
 // | ```tsx
-// | this
+// | this: this
 // | ```
 // | 
 // | ----------------------------------------------------------------------
@@ -56,7 +56,7 @@
 //                         ^^^^
 // | ----------------------------------------------------------------------
 // | ```tsx
-// | number
+// | this: number
 // | ```
 // | 
 // | ----------------------------------------------------------------------
@@ -76,7 +76,7 @@
     "item": {
       "contents": {
         "kind": "markdown",
-        "value": "```tsx\n{ num: number; f(): void; g(this: number): void; }\n```\n"
+        "value": "```tsx\nthis: { num: number; f(): void; g(this: number): void; }\n```\n"
       },
       "range": {
         "start": {
@@ -103,7 +103,7 @@
     "item": {
       "contents": {
         "kind": "markdown",
-        "value": "```tsx\n{ num: number; f(): void; g(this: number): void; }\n```\n"
+        "value": "```tsx\nthis: { num: number; f(): void; g(this: number): void; }\n```\n"
       },
       "range": {
         "start": {
@@ -130,7 +130,7 @@
     "item": {
       "contents": {
         "kind": "markdown",
-        "value": "```tsx\nnumber\n```\n"
+        "value": "```tsx\nthis: number\n```\n"
       },
       "range": {
         "start": {
@@ -157,7 +157,7 @@
     "item": {
       "contents": {
         "kind": "markdown",
-        "value": "```tsx\nthis\n```\n"
+        "value": "```tsx\nthis: this\n```\n"
       },
       "range": {
         "start": {
@@ -184,7 +184,7 @@
     "item": {
       "contents": {
         "kind": "markdown",
-        "value": "```tsx\nthis\n```\n"
+        "value": "```tsx\nthis: this\n```\n"
       },
       "range": {
         "start": {
@@ -211,7 +211,7 @@
     "item": {
       "contents": {
         "kind": "markdown",
-        "value": "```tsx\nnumber\n```\n"
+        "value": "```tsx\nthis: number\n```\n"
       },
       "range": {
         "start": {