Propose changes for file name + line number

I feel it is more accepted to use `filename.ext:123` as this can easily be copied and pasted and use when looking up a file on sublime, chrome dev tools source files.

it will help us save a few seconds each time we need to find the specific page and line number to make changes or place break points..
Merge pull request #48 from valtido/patch-2

Propose changes for file name + line number