Require a colon separator and anchor the Negative label to a line start so the word 'negative' in the positive prompt body (e.g. the art term 'negative space') is no longer mistaken for a stream label. Add regression tests.
Require a colon separator and anchor the Negative label to a line start so the word 'negative' in the positive prompt body (e.g. the art term 'negative space') is no longer mistaken for a stream label. Add regression tests.