QmlJs: Fix reformatter for template strings

Change-Id: Ie0b7909d634d1e2e735377b053f7a1c1c2518f78
Reviewed-by: Fawzi Mohamed <fawzi.mohamed@qt.io>

src/libs/qmljs/qmljsreformatter.cpp

@@ -802,6 +802,13 @@ protected:
     bool visit(StringLiteralPropertyName *ast) override { out(ast->id.toString()); return true; }
     bool visit(NumericLiteralPropertyName *ast) override { out(QString::number(ast->id)); return true; }
 
+    bool visit(TemplateLiteral *ast) override
+    {
+        out(ast->literalToken);
+        accept(ast->expression);
+        return true;
+    }
+
     bool visit(ArrayMemberExpression *ast) override
     {
         accept(ast->base);

tests/auto/qml/reformatter/jssyntax.js

@@ -21,6 +21,11 @@ const func4 = (x, y) => {
     return x + y
 }
 
+const s1 = `test`
+const s2 = `${42 * 1}`
+const s3 = `test ${s2}`
+const s4 = `${s2}${s3}test`
+
 while (true) {
     for (var a = 1; a < 5; ++a) {
         switch (a) {