flair correct documention doesn't define what <prefix>_ is

[diekhans]

Document says flair correct output is:

        <prefix>_all_corrected.bed for use in subsequent steps
        <prefix>_all_inconsistent.bed rejected alignments
        <prefix>_cannot_verify.bed (only if the) chromosome is not found in annotation

with no clue as to where <prefix>_ comes from.