Fix useless "Remove curly braces" before Chinese character

So #KT-20409 Fixed

compiler/frontend/src/org/jetbrains/kotlin/psi/psiUtil/ktPsiUtil.kt

@@ -460,7 +460,7 @@ fun KtExpression.getOutermostParenthesizerOrThis(): KtExpression {
 
 fun PsiElement.isFunctionalExpression(): Boolean = this is KtNamedFunction && nameIdentifier == null
 
-private val BAD_NEIGHBOUR_FOR_SIMPLE_TEMPLATE_ENTRY_PATTERN = Regex("[a-zA-Z0-9_].*")
+private val BAD_NEIGHBOUR_FOR_SIMPLE_TEMPLATE_ENTRY_PATTERN = Regex("([a-zA-Z0-9_]|[^\\p{ASCII}]).*")
 
 fun canPlaceAfterSimpleNameEntry(element: PsiElement?): Boolean {
     val entryText = element?.text ?: return true

idea/testData/intentions/removeCurlyBracesFromTemplate/necessaryBrackets6.kt

@@ -0,0 +1,5 @@
+// IS_APPLICABLE: false
+fun foo() {
+    val x = 3
+    val y = "$<caret>{x}コトリン"
+}

idea/testData/quickfix/removeToStringInStringTemplate/necessaryBrackets1.kt

@@ -0,0 +1,4 @@
+// "Remove 'toString()' call" "true"
+
+val foo = "test"
+val bar = "${foo.toString()<caret>}_"

idea/testData/quickfix/removeToStringInStringTemplate/necessaryBrackets1.kt.after

@@ -0,0 +1,4 @@
+// "Remove 'toString()' call" "true"
+
+val foo = "test"
+val bar = "${foo<caret>}_"

idea/testData/quickfix/removeToStringInStringTemplate/necessaryBrackets2.kt

@@ -0,0 +1,4 @@
+// "Remove 'toString()' call" "true"
+
+val foo = "test"
+val bar = "${foo.toString()<caret>}コトリン"

idea/testData/quickfix/removeToStringInStringTemplate/necessaryBrackets2.kt.after

@@ -0,0 +1,4 @@
+// "Remove 'toString()' call" "true"
+
+val foo = "test"
+val bar = "${foo<caret>}コトリン"

idea/tests/org/jetbrains/kotlin/idea/intentions/IntentionTestGenerated.java

@@ -12620,6 +12620,12 @@ public class IntentionTestGenerated extends AbstractIntentionTest {
             doTest(fileName);
         }
 
+        @TestMetadata("necessaryBrackets6.kt")
+        public void testNecessaryBrackets6() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/intentions/removeCurlyBracesFromTemplate/necessaryBrackets6.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("unnecessaryBrackets1.kt")
         public void testUnnecessaryBrackets1() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("idea/testData/intentions/removeCurlyBracesFromTemplate/unnecessaryBrackets1.kt");

idea/tests/org/jetbrains/kotlin/idea/quickfix/QuickFixTestGenerated.java

@@ -8879,6 +8879,18 @@ public class QuickFixTestGenerated extends AbstractQuickFixTest {
             doTest(fileName);
         }
 
+        @TestMetadata("necessaryBrackets1.kt")
+        public void testNecessaryBrackets1() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/quickfix/removeToStringInStringTemplate/necessaryBrackets1.kt");
+            doTest(fileName);
+        }
+
+        @TestMetadata("necessaryBrackets2.kt")
+        public void testNecessaryBrackets2() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/quickfix/removeToStringInStringTemplate/necessaryBrackets2.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("simple.kt")
         public void testSimple() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("idea/testData/quickfix/removeToStringInStringTemplate/simple.kt");