It would be awesome if you could click on line numbers in a file preview and retrieve a permalink to that specific line.
+1 on this, would be useful
In the commit I referenced you will find the changes I made to implement this feature for my own install of gitlab.
For the record, the lineseparator option is not required, but made for more readable source output while I was debugging this and I chose to leave it.
Just landed on master (see #1937). :)
Line-range would be nice :)