Be more specific in errors.

DanielRosenwasser · DanielRosenwasser · commit cee933ff099a · 2019-02-21T10:50:14.000-08:00
diff --git a/src/compiler/checker.ts b/src/compiler/checker.ts
@@ -24448,7 +24448,7 @@ namespace ts {
                     const bodySignature = getSignatureFromDeclaration(bodyDeclaration);
                     for (const signature of signatures) {
                         if (!isImplementationCompatibleWithOverload(bodySignature, signature)) {
-                            error(signature.declaration, Diagnostics.Overload_signature_is_not_compatible_with_function_implementation);
+                            error(signature.declaration, Diagnostics.This_overload_signature_is_not_compatible_with_its_implementation_signature);
                             break;
                         }
                     }
diff --git a/src/compiler/diagnosticMessages.json b/src/compiler/diagnosticMessages.json
@@ -1404,7 +1404,7 @@
         "category": "Error",
         "code": 2393
     },
-    "Overload signature is not compatible with function implementation.": {
+    "This overload signature is not compatible with its implementation signature.": {
         "category": "Error",
         "code": 2394
     },

Original file line number	Diff line number	Diff line change
`@@ -24448,7 +24448,7 @@ namespace ts {`
`24448`	`24448`	`const bodySignature = getSignatureFromDeclaration(bodyDeclaration);`
`24449`	`24449`	`for (const signature of signatures) {`
`24450`	`24450`	`if (!isImplementationCompatibleWithOverload(bodySignature, signature)) {`
`24451`		`- error(signature.declaration, Diagnostics.Overload_signature_is_not_compatible_with_function_implementation);`
	`24451`	`+ error(signature.declaration, Diagnostics.This_overload_signature_is_not_compatible_with_its_implementation_signature);`
`24452`	`24452`	`break;`
`24453`	`24453`	`}`
`24454`	`24454`	`}`