More correct convertation to string template when number literals involved

idea/src/org/jetbrains/kotlin/idea/intentions/ConvertToStringTemplateIntention.kt

@@ -85,11 +85,20 @@ class ConvertToStringTemplateIntention : SelfTargetingOffsetIndependentIntention
         if (expr == null) return ""
         val expression = KtPsiUtil.safeDeparenthesize(expr)
         val expressionText = expression.text
-        return when (expression) {
+        when (expression) {
             is KtConstantExpression -> {
                 val bindingContext = expression.analyze(BodyResolveMode.PARTIAL)
+                val type = bindingContext.getType(expression)!!
+
+                if (KotlinBuiltIns.isChar(type)) {
+                    return expressionText.removePrefix("'").removeSuffix("'")
+                }
+
                 val constant = ConstantExpressionEvaluator.getConstant(expression, bindingContext)
-                StringUtil.escapeStringCharacters(constant?.getValue(bindingContext.getType(expression)!!).toString())
+                val stringValue = constant?.getValue(type).toString()
+                if (stringValue == expressionText) {
+                    return StringUtil.escapeStringCharacters(stringValue)
+                }
             }
 
             is KtStringTemplateExpression -> {
@@ -101,17 +110,17 @@ class ConvertToStringTemplateIntention : SelfTargetingOffsetIndependentIntention
                     StringUtil.unquoteString(expressionText)
                 }
                 if (forceBraces && base.endsWith('$')) {
-                    base.dropLast(1) + "\\$"
+                    return base.dropLast(1) + "\\$"
                 }
                 else {
-                    base
+                    return base
                 }
             }
 
             is KtNameReferenceExpression ->
-                "$" + (if (forceBraces) "{$expressionText}" else expressionText)
+                return "$" + (if (forceBraces) "{$expressionText}" else expressionText)
-
-            else -> "\${" + expressionText.replace("\n+".toRegex(), " ") + "}"
         }
+
+        return "\${" + expressionText.replace("\n+".toRegex(), " ") + "}"
     }
 }

idea/testData/intentions/convertToStringTemplate/interpolateStringWithFloat.kt.after

@@ -1,3 +1,3 @@
 fun main(args: Array<String>){
-    val x = "abc0.32"
+    val x = "abc${0.320}"
 }

idea/testData/intentions/convertToStringTemplate/numberLiterals.kt

@@ -0,0 +1,3 @@
+fun foo(p1: Int, p2: Int, p3: Int) {
+    val v = <caret>"a" + 0xAAA + p1 + 123 + p2 + 1.25 + "b"
+}

idea/testData/intentions/convertToStringTemplate/numberLiterals.kt.after

@@ -0,0 +1,3 @@
+fun foo(p1: Int, p2: Int, p3: Int) {
+    val v = <caret>"a${0xAAA}${p1}123${p2}1.25b"
+}

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

@@ -4675,6 +4675,12 @@ public class IntentionTestGenerated extends AbstractIntentionTest {
             doTest(fileName);
         }
 
+        @TestMetadata("numberLiterals.kt")
+        public void testNumberLiterals() throws Exception {
+            String fileName = KotlinTestUtils.navigationMetadata("idea/testData/intentions/convertToStringTemplate/numberLiterals.kt");
+            doTest(fileName);
+        }
+
         @TestMetadata("onlyForConcat.kt")
         public void testOnlyForConcat() throws Exception {
             String fileName = KotlinTestUtils.navigationMetadata("idea/testData/intentions/convertToStringTemplate/onlyForConcat.kt");