Add braces: don't insert extra line break and move the following comment

#KT-36194 Fixed

idea/testData/intentions/addBraces/hasCommentOnNextLine.kt

@@ -0,0 +1,13 @@
+fun foo(list: List<String>) {
+    if (true)<caret> println(list)
+
+    // printing...
+    println("hi")
+
+    for (l in list) println(l)
+
+    // printing...
+    println("hi")
+}
+
+fun println(a: Any) {}

idea/testData/intentions/addBraces/hasCommentOnNextLine.kt.after

@@ -0,0 +1,15 @@
+fun foo(list: List<String>) {
+    if (true) {
+        println(list)
+    }
+
+    // printing...
+    println("hi")
+
+    for (l in list) println(l)
+
+    // printing...
+    println("hi")
+}
+
+fun println(a: Any) {}

idea/testData/intentions/addBraces/hasCommentOnNextLine2.kt

@@ -0,0 +1,13 @@
+fun foo(list: List<String>) {
+    if (true) println(list)
+
+    // printing...
+    println("hi")
+
+    for (l in list)<caret> println(l)
+
+    // printing...
+    println("hi")
+}
+
+fun println(a: Any) {}

idea/testData/intentions/addBraces/hasCommentOnNextLine2.kt.after

@@ -0,0 +1,15 @@
+fun foo(list: List<String>) {
+    if (true) println(list)
+
+    // printing...
+    println("hi")
+
+    for (l in list) {
+        println(l)
+    }
+
+    // printing...
+    println("hi")
+}
+
+fun println(a: Any) {}