Using DIV as tagName does not trim trailing newline

[janekh]

Trailing newline is not removed when blots/block tagName is replaced with DIV.
This check was added in 1fab1bd
But when you replace the tagName all delta ops will have attribute {block: true} and this check is not correct.

Steps for Reproduction

var Block = Quill.import("blots/block");
Block.tagName = "DIV";
Quill.register(Block, true);

Use HTML

<div>This is a test</div>

Expected behavior:

<div>This is a test</div>

Actual behavior:

<div>This is a test</div>
<div><br></div>

Platforms:

Windows Chrome, Windows Firefox, Mac Firefox, Mac Chrome

Version:

2.0.0