= NAME =
is_empty

= SYNOPSIS =
is_empty <parameter>

= DESCRIPTION =
Checks is it's argument is the empty string.  If so, prints an error and exits.

This routine is used internally by several routines to check that their
own parameters were non-empty.

= EXAMPLES =
Here are some sample invocations:
{{{#!YellowBox
  is_empty $1
}}}

= ENVIRONMENT and ARGUMENTS =
 * $1 is 

= RETURN =
Returns if the parameter is non-empty.  Exits otherwise.

= SOURCE =
Located in ''scripts/functions.sh''

= SEE ALSO =