Better indentation for expressions without parsed errors (KT-12123)

#KT-12123 Fixed

idea/formatter/src/org/jetbrains/kotlin/idea/formatter/KotlinCommonBlock.kt

@@ -17,6 +17,7 @@
 package org.jetbrains.kotlin.idea.formatter
 
 import com.intellij.formatting.*
+import com.intellij.formatting.ChildAttributes.DELEGATE_TO_NEXT_CHILD
 import com.intellij.lang.ASTNode
 import com.intellij.psi.TokenType
 import com.intellij.psi.codeStyle.CodeStyleSettings
@@ -195,6 +196,11 @@ abstract class KotlinCommonBlock(
                     }
                 }
 
+                if (blocks.size > newChildIndex) {
+                    val block = blocks[newChildIndex]
+                    return ChildAttributes(block.indent, block.alignment)
+                }
+
                 ChildAttributes(Indent.getNoneIndent(), null)
             }
         }

idea/tests/org/jetbrains/kotlin/idea/editor/TypedHandlerTest.kt

@@ -603,6 +603,42 @@ class TypedHandlerTest : LightCodeInsightTestCase() {
         )
     }
 
+    fun testIndentOnFinishedVariableEndAfterEquals() {
+        doCharTypeTest(
+                '\n',
+                """
+                |fun test() {
+                |    val a =<caret>
+                |    foo()
+                |}
+                """,
+                """
+                |fun test() {
+                |    val a =
+                |            <caret>
+                |    foo()
+                |}
+                """
+        )
+    }
+
+    fun testIndentNotFinishedVariableEndAfterEquals() {
+        doCharTypeTest(
+                '\n',
+                """
+                |fun test() {
+                |    val a =<caret>
+                |}
+                """,
+                """
+                |fun test() {
+                |    val a =
+                |            <caret>
+                |}
+                """
+        )
+    }
+
 
     fun testMoveThroughGT() {
         LightPlatformCodeInsightTestCase.configureFromFileText("a.kt", "val a: List<Set<Int<caret>>>")