"Merge with next when": made applicable when delimited by ';' or comment

So #KT-12042 Fixed

idea/testData/intentions/branched/when/merge/hasCommentBetweenWhen.kt

@@ -0,0 +1,15 @@
+fun <T> doSomething(a: T) {}
+
+fun test(a: Int) {
+    <caret>when (a) {
+        0 -> doSomething("A")
+        1 -> doSomething("B")
+    }
+
+    // comment
+
+    when (a) {
+        0 -> doSomething("C")
+        1 -> doSomething("D")
+    }
+}

idea/testData/intentions/branched/when/merge/hasCommentBetweenWhen.kt.after

@@ -0,0 +1,16 @@
+fun <T> doSomething(a: T) {}
+
+fun test(a: Int) {
+    <caret>when (a) {
+        0 -> {
+            doSomething("A")
+            doSomething("C")
+        }
+        1 -> {
+            doSomething("B")
+            doSomething("D")
+        }
+    }
+
+    // comment
+}

idea/testData/intentions/branched/when/merge/hasSemicolonBetweenWhen.kt

@@ -0,0 +1,13 @@
+fun <T> doSomething(a: T) {}
+
+fun test(a: Int) {
+    <caret>when (a) {
+        0 -> doSomething("A")
+        1 -> doSomething("B")
+    };
+
+    when (a) {
+        0 -> doSomething("C")
+        1 -> doSomething("D")
+    }
+}

idea/testData/intentions/branched/when/merge/hasSemicolonBetweenWhen.kt.after

@@ -0,0 +1,14 @@
+fun <T> doSomething(a: T) {}
+
+fun test(a: Int) {
+    <caret>when (a) {
+        0 -> {
+            doSomething("A")
+            doSomething("C")
+        }
+        1 -> {
+            doSomething("B")
+            doSomething("D")
+        }
+    }
+}