qmljsreformatter: don't default foreach type to "in"

Fixes: QTCREATORBUG-29123
Change-Id: I4d3a611c359946c4483388cbf18a0b6f16d0a8d6
Reviewed-by: Fabian Kosmale <fabian.kosmale@qt.io>

src/libs/qmljs/qmljsreformatter.cpp

@@ -1088,7 +1088,10 @@ class Rewriter : protected Visitor
         out(" ");
         out(ast->lparenToken);
         accept(ast->lhs);
-        out(" in ");
+        if (ast->type == ForEachType::In)
+            out(" in ");
+        else
+            out(" of ");
         accept(ast->expression);
         out(ast->rparenToken);
         acceptBlockOrIndented(ast->statement);

tests/auto/qml/reformatter/forEachType.qml

@@ -0,0 +1,9 @@
+import QtQml
+
+QtObject {
+    Component.onCompleted: {
+        for (var i of ["one", "two", "free"]) {
+            console.debug(i)
+        }
+    }
+}