Sub Articulo 109.1
Here is an environment to add an em-dash (`---' in LaTeX source) to th
e
beginning of every PARAGRAPH. I don't know how to do every line, but
I
think you want every paragraph instead of what you asked for. It's no
t
very TeX-like to have lines be significant in this way in a source fil
e.
I'm not sure whether you want the usual paragraph indentation before t
he
em-dash. Uncomment the \setlength command and specify the space you
want before the dash there, if you want to change it from the norm for
the surrounding document.
\newenvironment{portugesedialogue} {%
% \setlength\parindent{0pt}
\everypar={---}%
}{}