This is a long string, but the text editing area shows only one line with no wrapping at all, so one has to horizontal scroll to see the rest of the text.
I have also thought about this, but I’m unsure what else to propose. Would you prefer the text field to grow its size as needed or to edit in a modal text field (as is the case with glyphOrder). The former would work well for a few lines, but some text fields like licenses would take up a lot of space. The latter makes editing text a multi step process (open modal, edit, confirm edit and close modal).
(Perhaps only auto grow up to a certain maximum height and allow scrolling if there is more text?)
Model window would be OK. But the text field can also grow with a max number of lines (say 5), scrolling wouldn’t be a big issue in this case and the presence of a scroll part will indicate that there is more text. It can be even a simple condition; if the text fits in one line all is good, otherwise switch to a multi-line widget with a fixed height.