In en.tab line 2180 "Revenue" should be "Profit" ... otherwise in the Line Management dialogue, the top total and each individual convoy can have negative "Revenue" -- clearly impossible.
In gui/schedule_list.cc, the variable (see line 657) indeed is called "profit" so the translation is simply incorrect.
I would open a pull request but -- what is the correct protocol? Surely not creating a new branch for each of these minor changes, and we don't have write access to Master branch do we?
Splendid, thank you for spotting that: now fixed.
As to branches - you do not need to create a new branch for each fix, as you can simply push to the master branch on your own repository, which I can then merge.