Render incompatible impl member in "no impl for header" diagnostic

compiler/frontend/src/org/jetbrains/kotlin/diagnostics/rendering/PlatformIncompatibilityDiagnosticRenderer.kt

@@ -48,10 +48,14 @@ object PlatformIncompatibilityDiagnosticRenderer :
             append("The following declaration")
             if (descriptors.size == 1) append(" is") else append("s are")
             append(" incompatible")
-            incompatibility.reason?.let { append(" because $it") }
+            incompatibility.reason?.let { appendln(" because $it:") }
+
+            for (descriptor in descriptors) {
+                append(indent + "    ")
+                appendln(renderDescriptor(descriptor))
+            }
 
             incompatibility.unimplemented?.let { unimplemented ->
-                appendln(".")
                 append(indent)
                 appendln("No implementations are found for members listed below:")
                 for ((descriptor, mapping) in unimplemented) {
@@ -63,12 +67,6 @@ object PlatformIncompatibilityDiagnosticRenderer :
                     }
                     render(mapping, indent + INDENTATION_UNIT, renderDescriptor)
                 }
-            } ?: run {
-                appendln(":")
-                for (descriptor in descriptors) {
-                    append(indent + "    ")
-                    appendln(renderDescriptor(descriptor))
-                }
             }
         }
     }

compiler/testData/multiplatform/classScopes/constructorIncorrectSignature/output.txt

@@ -6,7 +6,8 @@ Output:
 Exit code: COMPILATION_ERROR
 Output:
 compiler/testData/multiplatform/classScopes/constructorIncorrectSignature/common.kt:1:14: error: header declaration 'Foo' has no implementation in module
-The following declaration is incompatible because some members are not implemented.
+The following declaration is incompatible because some members are not implemented:
+    public final impl class Foo
 No implementations are found for members listed below:
 
     public constructor Foo(s: String)
@@ -22,4 +23,3 @@ impl class Foo {
 compiler/testData/multiplatform/classScopes/constructorIncorrectSignature/jvm.kt:2:5: error: modifier 'impl' is only applicable to members that are initially declared in platform-independent code
     impl constructor(s: Array<String>)
     ^
-

compiler/testData/multiplatform/classScopes/functionIncorrectSignature/output.txt

@@ -6,7 +6,8 @@ Output:
 Exit code: COMPILATION_ERROR
 Output:
 compiler/testData/multiplatform/classScopes/functionIncorrectSignature/common.kt:1:14: error: header declaration 'Foo' has no implementation in module
-The following declaration is incompatible because some members are not implemented.
+The following declaration is incompatible because some members are not implemented:
+    public final impl class Foo
 No implementations are found for members listed below:
 
     public final header fun function(b: ByteArray): Int
@@ -22,4 +23,3 @@ impl class Foo {
 compiler/testData/multiplatform/classScopes/functionIncorrectSignature/jvm.kt:2:5: error: modifier 'impl' is only applicable to members that are initially declared in platform-independent code
     impl fun function(b: ByteArray): Long = b.size.toLong()
     ^
-

compiler/testData/multiplatform/classScopes/missingConstructor/output.txt

@@ -6,7 +6,8 @@ Output:
 Exit code: COMPILATION_ERROR
 Output:
 compiler/testData/multiplatform/classScopes/missingConstructor/common.kt:1:14: error: header declaration 'Foo' has no implementation in module
-The following declaration is incompatible because some members are not implemented.
+The following declaration is incompatible because some members are not implemented:
+    public final impl class Foo
 No implementations are found for members listed below:
 
     public constructor Foo(s: String)
@@ -19,4 +20,3 @@ header class Foo {
 compiler/testData/multiplatform/classScopes/missingConstructor/jvm.kt:1:1: error: modifier 'impl' is only applicable to members that are initially declared in platform-independent code
 impl class Foo
 ^
-

compiler/testData/multiplatform/classScopes/missingFunction/output.txt

@@ -6,7 +6,8 @@ Output:
 Exit code: COMPILATION_ERROR
 Output:
 compiler/testData/multiplatform/classScopes/missingFunction/common.kt:1:14: error: header declaration 'Foo' has no implementation in module
-The following declaration is incompatible because some members are not implemented.
+The following declaration is incompatible because some members are not implemented:
+    public final impl class Foo
 No implementations are found for members listed below:
 
     public final header fun function(s: String): Unit
@@ -16,4 +17,3 @@ header class Foo {
 compiler/testData/multiplatform/classScopes/missingFunction/jvm.kt:1:1: error: modifier 'impl' is only applicable to members that are initially declared in platform-independent code
 impl class Foo
 ^
-