ref: 1e8eb61a3715b12d8bc1cfd866f5bb180f2941f2
dir: /sys/src/cmd/python/Doc/texinputs/python.ist/
line_max 100
headings_flag 1
heading_prefix " \\bigletter "
preamble "\\begin{theindex}
\\def\\bigletter#1{{\\Large\\sffamily#1}\\nopagebreak\\vspace{1mm}}
"
symhead_positive "{Symbols}"
numhead_positive "{Numbers}"