Space is trimmed when replacing delimiter of string literal contains trailing space

[rhysd]

When cursor is on 'f',

puts 'foo '

<Plug>(operator-surround-replace)a'" will change above code to:

puts "foo" 

Note that the line has one trailing space at the end of line. So 'foo ' is modified to "foo" .

This occurs because replacing is implemented as a combination of deleting and appending a surround. It deletes the surrounding ' at first(foo ), and then appends surrounding " next("foo" ). When appending the surround, the space is not counted as surrounding and only 'foo' is considered as target.