Enable auto-indent in multiline strings when caret is before interpolation

#KT-17849 Fixed

idea/src/org/jetbrains/kotlin/idea/editor/KotlinMultilineStringEnterHandler.kt

@@ -273,7 +273,7 @@ class KotlinMultilineStringEnterHandler : EnterHandlerDelegateAdapter() {
                 KtTokens.REGULAR_STRING_PART -> {
                     // Ok
                 }
-                KtTokens.CLOSING_QUOTE -> {
+                KtTokens.CLOSING_QUOTE, KtTokens.SHORT_TEMPLATE_ENTRY_START, KtTokens.LONG_TEMPLATE_ENTRY_START -> {
                     if (element.startOffset != offset) {
                         return null
                     }

idea/testData/editor/enterHandler/multilineString/spaces/enterBeforeLongEntryOneLine.kt

@@ -0,0 +1,6 @@
+val className = 1
+val test = """<caret>${className}"""
+//-----
+val className = 1
+val test = """
+    <caret>${className}""".trimIndent()

idea/testData/editor/enterHandler/multilineString/spaces/enterBeforeShortEntryOneLine.kt

@@ -0,0 +1,6 @@
+val className = 1
+val test = """<caret>$className"""
+//-----
+val className = 1
+val test = """
+    <caret>$className""".trimIndent()

idea/tests/org/jetbrains/kotlin/idea/editor/MultiLineStringIndentTestGenerated.java

@@ -104,12 +104,24 @@ public class MultiLineStringIndentTestGenerated extends AbstractMultiLineStringI
             doTest(fileName);
         }
 
+        @TestMetadata("enterBeforeLongEntryOneLine.kt")
+        public void testEnterBeforeLongEntryOneLine() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/editor/enterHandler/multilineString/spaces/enterBeforeLongEntryOneLine.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("enterBeforeMarginChar.kt")
         public void testEnterBeforeMarginChar() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("idea/testData/editor/enterHandler/multilineString/spaces/enterBeforeMarginChar.kt");
             doTest(fileName);
         }
 
+        @TestMetadata("enterBeforeShortEntryOneLine.kt")
+        public void testEnterBeforeShortEntryOneLine() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/editor/enterHandler/multilineString/spaces/enterBeforeShortEntryOneLine.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("enterInInfixMargin.kt")
         public void testEnterInInfixMargin() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("idea/testData/editor/enterHandler/multilineString/spaces/enterInInfixMargin.kt");