eliminated spurious Unicode, which is in conflict with Isabelle symbol interpretation;
#!/usr/bin/env bash
#
# Author: Makarius
#
# DESCRIPTION: build Isabelle documentation
isabelle_admin_build jars || exit $?
case "$ISABELLE_JAVA_PLATFORM" in
x86-*)
ISABELLE_BUILD_JAVA_OPTIONS="$ISABELLE_BUILD_JAVA_OPTIONS32"
;;
x86_64-*)
ISABELLE_BUILD_JAVA_OPTIONS="$ISABELLE_BUILD_JAVA_OPTIONS64"
;;
esac
declare -a JAVA_ARGS; eval "JAVA_ARGS=($ISABELLE_BUILD_JAVA_OPTIONS)"
isabelle java "${JAVA_ARGS[@]}" isabelle.Build_Doc "$@"