7.4 CR-based Line Breaks

Line breaks \\ in , for instance, the ‘verse’ environment are requested indirectly through the following.

<..html latex env..>+
 \def\@centercr{\ifhmode \unskip\else \@nolnerr\fi
    \ifx \EndPicture\:UnDef \a:centercr \b:centercr
    \fi    \par   \@ifstar{\nobreak\@xcentercr}\@xcentercr}
 -_-_-

<..html latex env..>+
 \def\@icentercr[#1]{%
    \ifx \EndPicture\:UnDef
       \ifdim #1>0.5\baselineskip \a:centercr\fi
    \fi  \vskip #1\ignorespaces}
 -_-_-

<..config latex.ltx utilities..>+
 \NewConfigure{centercr}{2}
 -_-_-

Where ‘<P>’ comes from???

[test data]