Modified Lines Only

[chikamichi]

As proposed in #8, replicate RubyMine's feature (http://www.jetbrains.com/ruby/webhelp/editor.html): upon deletion, proceed with respect to a setting describing which lines should be affected (All | Modified Lines | None).

In RubyMine, it occurs at saving only ("Strip trailing spaces on Save"), so their default value is of None. It is not relevant for this plugin, though, so we are only concerned about the choice between All and Modified Lines.

This feature could prove very useful in conjunction with automated trimming on save, so it may make the case for providing a setting "trim_on_save" with a default value of False.

[chikamichi]

I have a working implementation. This feature should land very soon!

[chikamichi]

Live!