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45 utility reads the named files (or standard input if none are given)
46 and translates occurrences of underscores to the sequence
47 which indicates underlining for the terminal in use, as specified
48 by the environment variable
52 is read to determine the appropriate sequences for underlining.
53 If the terminal is incapable of underlining, but is capable of
54 a standout mode then that is used instead.
55 If the terminal can overstrike,
56 or handles underlining automatically,
60 If the terminal cannot underline, underlining is ignored.
62 The following options are available:
63 .Bl -tag -width indent
65 Underlining is indicated by a separate line containing appropriate
68 this is useful when you want to look at the underlining
69 which is present in an
71 output stream on a CRT-terminal.
73 Overrides the terminal type specified in the environment with
78 .Ev LANG , LC_ALL , LC_CTYPE
81 environment variables affect the execution of
99 command usually outputs a series of backspaces and underlines intermixed
100 with the text to indicate underlining.
101 No attempt is made to optimize