1 02/11/85  default
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 3 Syntax as a command:  default STRA {STRB}
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 6 Syntax as an active function:  [default STRA {STRB}]
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 9 Function: supplies default arguments to commands and can override this
10 default when desired.  Use this command with the abbrev and do
11 commands.
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14 Notes: If you provide no STRB or it is the null string, STRA is
15 returned.