allow a newline before dot usage, for chained/fluent interfaces

test/language/chained_newline.wren

@@ -0,0 +1,114 @@
+class Test {
+  construct new() {}
+  test0() {
+    System.print("test0")
+    return this
+  }
+  test1() {
+    System.print("test1")
+    return this
+  }
+  test2() {
+    System.print("test2")
+    return this
+  }
+}
+
+class Tester {
+  construct new() {
+
+    var test = _test = Test.new()
+
+    //test local access
+
+    test.
+      test0().  // expect: test0
+      test1().  // expect: test1
+      test2()   // expect: test2
+
+    test
+      .test0()  // expect: test0
+      .test1()  // expect: test1
+      .test2()  // expect: test2
+
+    test
+      .test0()  // expect: test0
+      .test1(). // expect: test1
+      test2()   // expect: test2
+
+    //test field access
+
+    _test.
+      test0().  // expect: test0
+      test1().  // expect: test1
+      test2()   // expect: test2
+
+    _test
+      .test0()  // expect: test0
+      .test1()  // expect: test1
+      .test2()  // expect: test2
+
+    _test
+      .test0(). // expect: test0
+       test1(). // expect: test1
+       test2()  // expect: test2
+
+  }
+
+  getter { _test }
+  method() { _test }
+
+} //Tester
+
+//access via methods/getter
+
+var external = Tester.new()
+
+external.getter.
+  test0().  // expect: test0
+  test1().  // expect: test1
+  test2()   // expect: test2
+
+external.getter
+  .test0()  // expect: test0
+  .test1()  // expect: test1
+  .test2()  // expect: test2
+
+external.getter.
+   test0()  // expect: test0
+  .test1()  // expect: test1
+  .test2()  // expect: test2
+
+external.method().
+  test0().  // expect: test0
+  test1().  // expect: test1
+  test2()   // expect: test2
+
+external.method()
+  .test0()  // expect: test0
+  .test1()  // expect: test1
+  .test2()  // expect: test2
+
+external.method().
+  test0()   // expect: test0
+  .test1(). // expect: test1
+  test2()   // expect: test2
+
+//regular access in module scope
+
+var other = Test.new()
+
+other.
+  test0(). // expect: test0
+  test1(). // expect: test1
+  test2()  // expect: test2
+
+other
+  .test0() // expect: test0
+  .test1() // expect: test1
+  .test2() // expect: test2
+
+other
+  .test0(). // expect: test0
+   test1()  // expect: test1
+  .test2()  // expect: test2