New, simpler and faster line splitter.

test/regression/0100/0198.stmt

 >>> (indent 2)
   testThat('backward navigation is disabled when at end of stream',
       when: (TaskList taskList, TaskService taskService) {
     var cursorPageNo = 0;
     final streamCtrl = initCustomTaskServiceMock(taskService,
         canMoveTo: (pageNo) => pageNo < 0 ? false : true,
         getCurrentPageNumber: () => cursorPageNo);
 
     first('attach tasklist', () {
       taskList.attach();
@@ skipping 28 matching lines @@
             'pager at page 1',
             () => {
                   taskList.currentPageNo: 1,
                   taskList.backwardPaginationDisabled: isFalse
                 })
         .then('go to page 2', () {
       taskList.nextPage();
       addTasks(streamCtrl, count: 1);
       cursorPageNo = 1;
     }).thenExpect(
-        'pager unchanged',
-        () => {
-              taskList.currentPageNo: 2,
-              taskList.backwardPaginationDisabled: isTrue
-            });
+            'pager unchanged',
+            () => {
+                  taskList.currentPageNo: 2,
+                  taskList.backwardPaginationDisabled: isTrue
+                });
   });