de P \" Paragraph
sp
.
de IZ
ll 67
.
de H \" Header
ce
\\$1
if !"\\$2"" \{\
br
ce
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if !"\\$3"" \{\
br
ce
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P
.
de BQ \" Blockquote Begin
in +5
ll -5
.
de BE \" Blockquote End
in
ll
.
de H2 \" Second-level Header
ce
\\$1
P
.
de CB \" Code Begin
BQ
nf
.
de CE \" Code End
fi
BE
.