more robust range on preceding comment-line;
no range for blank lines;
avoid recursive output_text/mark_range;
clarified Latex.output_token (no range) vs. Thy_Output.present_token (with range);
#!/usr/bin/env bash
set -e
FORMAT="$1"
VARIANT="$2"
isabelle logo HOL
isabelle latex -o "$FORMAT"
isabelle latex -o bbl
./isa-index root
isabelle latex -o "$FORMAT"
[ -f root.out ] && "$ISABELLE_HOME/src/Doc/fixbookmarks" root.out
isabelle latex -o "$FORMAT"