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\long\def\newblocktype#1#2#3#4{%
\def#1{\ptx@newblock_pattern{#2}{#3}{#4}}%
}
\newife\ifptx@newblock_group
\long\def\ptx@newblock_pattern#1#2#3{%
\ifnext*
{\ptx@newblock_grouptrue\gobbleoneand{\ptx@newblock{#1}{#2}{#3}}}
{\ptx@newblock_groupfalse\ptx@newblock{#1}{#2}{#3}}%
}
\long\def\ptx@newblock#1#2#3#4#5{%
\ifnextnospace*
{\gobbleoneand{\ptx@newblock_do#4{#1#5}{#2}{#3}}}
{\ptx@newblock_do#4{#1#5}{#2}{#3}{}}%
}
\long\def\ptx@newblock_do#1#2#3#4#5#6{%
\ifptx@newblock_group
{\defcs{ptx@inner_\commandtoname#1:start}{\bgroup#2}%
\defcs{ptx@inner_\commandtoname#1:stop}{#4#6\egroup}}
{\defcs{ptx@inner_\commandtoname#1:start}{#2}%
\defcs{ptx@inner_\commandtoname#1:stop}{#4#6}}%
\defcs{ptx@inner_\commandtoname#1:continue}{#3#5}%
\def#1##1{%
\ifelseif{%
{\ifstring{##1}{|}} {\skipspace{\usecs{ptx@inner_\commandtoname#1:continue}}}
{\ifstring{##1}{/}} {\usecs{ptx@inner_\commandtoname#1:stop}}
{\ifstring{##1}{>}} {\skipspace{\usecs{ptx@inner_\commandtoname#1:start}}}
\iftrue {\usecs{ptx@inner_\commandtoname#1:start}##1}}%
}%
}
\newblocktype\newblock{}{}{}
\def\Indent{\quitvmode\kern\parindent}
\gates new \Everypar {Everypar}
\Everypar list {everypar} [0]
[noindent] ?{status = close} {{\setbox0=\lastbox}}
\Everypar close {noindent}{everypar}
\everypar={\Everypar execute {everypar}}
\def\removenextindent{\Everypar ajar {noindent}{everypar}}
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