Diff viewer renders each line with an extra space character at the end

[Alex Willmer <al.willmer@…>]

The unified view of a diff adds an additional space character at the end of each source line. e.g. for [11007] the markup for the deleted line is

<th>5188</th><th>5188</th><td class="l"><span>msgid "Blame"</span> </td>

If the rendered line of diff is copy/pasted from the browser the space is copied also, introducing whitespace that wasn't in the original files