allow suffix of underscores (usually unused names), to extend completion beyond already recognized entry;
#!/usr/bin/env bash
set -e
FORMAT="$1"
VARIANT="$2"
"$ISABELLE_TOOL" logo
cp "$ISABELLE_HOME/src/Doc/iman.sty" .
cp "$ISABELLE_HOME/src/Doc/extra.sty" .
cp "$ISABELLE_HOME/src/Doc/ttbox.sty" .
cp "$ISABELLE_HOME/src/Doc/manual.bib" .
"$ISABELLE_HOME/src/Doc/prepare_document" "$FORMAT"