This function applies a last chance method of making final alteration of the ivl/vcs command line.
Alterations are made from a text file containing ed style regex substitutions
s/regex-pattern/substitution/ or more generally
s<<separator>>regex-pattern<<separator>>substitution<<separator>>
if the file begins with the line verbose, the substitution parsing and operation will be logged to stdout
This function applies a last chance method of making final alteration of the ivl/vcs command line. Alterations are made from a text file containing ed style regex substitutions s/regex-pattern/substitution/ or more generally s<<separator>>regex-pattern<<separator>>substitution<<separator>> if the file begins with the line verbose, the substitution parsing and operation will be logged to stdout