[IE] Extra <br> counted at the end of selection

[garry.yao]

With editor using enterMode BR:

1. load editor with the following content:

   <p>line1<br />line2<br />line3</p>
   

2. Have the first two lines fully selected (by mouse drag to expand selection)
3. Click on any block format command, e.g. Indentation.

• Actual Result: Last line is also affected;
• Expected: Only selected lines are affected.

[garry.yao]

IE and Opera seems to embrace the next line break br within the selection while the line text is fully selected, then after range expands, it reaches the end of next line, which is visually counter-intuitive.

[garry.yao]

Design TC updated: ​run

[fredck]

range::enlarge is really a damt beast!

[garry.yao]

Fixed with [7218].