Extend decorations to start of next line
Extend decorations to start of next line

This ensures that the git-line-added decoration is rendered on the last
line of a multi-line section, even if that line is empty. Previously
this didn’t work because non-emtpy decorations don’t show on the last
line if its column is 0.
anjerodesu/git-diff,atom/git-diff,UltCombo/git-diff