Fix link to Evil
Use `surround-line' instead of `evil-line' for linewise operations

`evil-line' is a motion that covers a number of lines as a line
range. This causes surround to add additional line breaks before and
after the text to be wrapped if used with `yss' commands.

The function `surround-line' covers the same characters but this time
as exclusive character range.
Merge branch 'master' of https://github.com/lyro/evil-surround