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(units.info)Readline support

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Readline support
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   If the `readline' package has been compiled in, then when `units' is
used interactively, numerous command line editing features are
available.  To check if your version of `units' includes the readline,
invoke the program with the `--version' option.

   For complete information about readline, consult the documentation
for the readline package.  Without any configuration, `units' will
allow editing in the style of emacs.  Of particular use with `units'
are the completion commands.

   If you type a few characters and then hit `ESC' followed by the `?'
key then `units' will display a list of all the units which start with
the characters typed.  For example, if you type `metr' and then request
completion, you will see something like this:

     You have: metr
     metre             metriccup         metrichorsepower  metrictenth
     metretes          metricfifth       metricounce       metricton
     metriccarat       metricgrain       metricquart       metricyarncount
     You have: metr

If there is a unique way to complete a unitname, you can hit the tab key
and `units' will provide the rest of the unit name.  If `units' beeps,
it means that there is no unique completion.  Pressing the tab key a
second time will print the list of all completions.