Unprefix: no
Unfold: no
\
  \
  This is not \
  a folded line

Unprefix: yes
Unfold: no
\
  \
  This is not \
  a folded line

Unprefix: no
Unfold: yes
    This is not   a folded line

Unprefix: yes
Unfold: yes
    This is not   a folded line
