Adlib list variables can now accept trailing modifier keywords prefixed with
a colon. These can be chained together to combine their effects.
:uc - uppercases the expansion
:lc - lowercases the expansion
:ucfirst - uppercases the first letter in the expansion
:title - lowercases the expansion and then uppercases the first letter
(effectively an alias for :lc:ucfirst)
Examples:
<pragma_> echo $colors:uc
<candide> RED
<pragma_> echo $colors:ucfirst
<candide> Blue
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