Woops! You edited a file with XML Copy Editor, but missed this note about how to make it safe to use. Now when you try to validate, you’re getting mysterious messages about “Content not allowed in prolog,” and your terminal looks something like this:

The fix is easy:
cd to the directory with your edited file (something like cd /vagrant/YOUR_REPOS/editions/Iliad or cd /vagrant/YOUR_REPOS/editions/scholia).bomstrip-files FILE_NAME (where FILE_NAME might be something like VenetusA-Iliad.xml or MainScholia.xml).