Fixed spelling mistake - 'yo tour' to 'to your'

Title for a link fixed

Fixed Typo problem

Don't enforce rbenv version

Fix broken commit link in branches page

It would be better not include either rbenv or a specific rbenv version
with gitlab.

Incorrect line numbering in diff

When displaying a diff, the line number always starts at one, even if the first diff is not at the first line
Fixes this to display correct line numbering on first diff