"Main should return Unit": report on identifier, delete block body type

idea/testData/inspectionsLocal/mainFunctionReturnUnit/notMain.kt

@@ -1,2 +1,2 @@
 // PROBLEM: none
-<caret>fun test(args: Array<String>): Int = 1
+fun <caret>test(args: Array<String>): Int = 1

idea/testData/inspectionsLocal/mainFunctionReturnUnit/notUnit1.kt

@@ -1,3 +1,3 @@
 // FIX: Add explicit Unit return type
 // DISABLE-ERRORS
-<caret>fun main(args: Array<String>) = 1
+fun <caret>main(args: Array<String>) = 1

idea/testData/inspectionsLocal/mainFunctionReturnUnit/notUnit1.kt.after

@@ -1,3 +1,3 @@
 // FIX: Add explicit Unit return type
 // DISABLE-ERRORS
-<caret>fun main(args: Array<String>): Unit = 1
+fun main(args: Array<String>): Unit = 1

idea/testData/inspectionsLocal/mainFunctionReturnUnit/notUnit2.kt

@@ -1,3 +1,3 @@
 // FIX: Change return type to Unit
 // DISABLE-ERRORS
-<caret>fun main(args: Array<String>): Int = 1
+fun <caret>main(args: Array<String>): Int = 1

idea/testData/inspectionsLocal/mainFunctionReturnUnit/notUnit2.kt.after

@@ -1,3 +1,3 @@
 // FIX: Change return type to Unit
 // DISABLE-ERRORS
-<caret>fun main(args: Array<String>): Unit = 1
+fun main(args: Array<String>): Unit = 1

idea/testData/inspectionsLocal/mainFunctionReturnUnit/notUnit3.kt

@@ -1,4 +1,4 @@
 // DISABLE-ERRORS
-<caret>fun main(args: Array<String>): Int {
+fun <caret>main(args: Array<String>): Int {
     return 1
 }

idea/testData/inspectionsLocal/mainFunctionReturnUnit/notUnit3.kt.after

@@ -1,4 +1,4 @@
 // DISABLE-ERRORS
-<caret>fun main(args: Array<String>): Unit {
+fun main(args: Array<String>) {
     return 1
 }

idea/testData/inspectionsLocal/mainFunctionReturnUnit/unit.kt

@@ -1,2 +1,2 @@
 // PROBLEM: none
-<caret>fun main(args: Array<String>) {}
+fun <caret>main(args: Array<String>) {}