ul

Display file with underlines

$ ul [file.txt]

$ ul -i [file.txt]

ul [OPTIONS] [FILE...]

ul translates underline sequences in text files to the appropriate terminal escape sequences. It processes files containing overstriking (backspace-based underlining) and converts them to display properly on modern terminals.
The tool reads files that use traditional underlining where each underlined character is followed by backspace and underscore.

-i, --indicated

Use dashes (-) for underlining

Override terminal type

Input must contain traditional overstrike underline sequences. Output depends on terminal capabilities. Modern text rarely uses this format.

ul is part of util-linux and dates from early Unix when terminals used overstrike sequences for formatting effects.

col(1), colcrt(1)