FormatInline "small" does not get removed

[Waxolunist]

I have written a command to format a text as <small>. This works as expected.
But removing the tag does not work because <small> is declared as a different nodetype than for instance <b>.

The command can be seen here: https://github.com/Waxolunist/bootstrap3-wysihtml5-bower/blob/v0.3.0-wip/src/commands/small.js

I have written a test: https://github.com/Waxolunist/bootstrap3-wysihtml5-bower/blob/v0.3.0-wip/test/bootstrap_editor_commands_test.js

The two last assertions do not work.