Method code for $string.to_html()

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arg line;

anticipate_assignment();
line = strsub(line, "&", "&");
line = strsub(line, "<", "&lt;");
line = strsub(line, ">", "&gt;");
line = strsub(line, "\"", "&quot;");
return line;

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// Created 27-Mar-1995 as a part of ColdCore, see: @help Credit