Feature request from mage2pro, posted on GitHub Nov 26, 2015
It is a long-term issue from Magento 1.x, and still is in Magento 2.
Looks an example here: https://github.com/magento/magento2/issues/2505#issuecomment-159754199
As you can see, the left half of screen contains the same file path in each line, and the right half chops significant parts of the messages.
Comment from buskamuza, posted on GitHub Nov 30, 2015
I propose to not do # 2 because currently we're moving in the direction of having components anywhere. It still requires some fixes to make everything working from outside of Magento root, but we're moving in this direction.
So, I think, it would be better to avoid any additional processing and just show real paths.
Comment from MauroNigrele, posted on GitHub Feb 07, 2016
I agree with point 1. Tis is a real big issue when trying to figire out an issue.