=== Height auto increment ===
 1. Put the cursor at the end of the document
 1. Add some new lines;
 * Expected: editor height grows with the newly added text;
=== Height auto decrement ===
 1. Put the cursor at the end of the document
 1. Delete couple of lines;
 * Expected: editor height shrinks with the deleted text;

Test auto grow editor height when content horizontally overflows.