improved generators for rational numbers to generate negative numbers;
added examples
#!/usr/bin/env bash
#
# Author: Makarius
#
# DESCRIPTION: Update standard keyword files for Emacs Proof General
ISABELLE_HOME="$(isabelle getenv -b ISABELLE_HOME)"
LOG="$(isabelle getenv -b ISABELLE_OUTPUT)"/log
cd "$ISABELLE_HOME/etc"
isabelle keywords \
"$LOG/Pure.gz" "$LOG/HOL.gz" "$LOG/HOLCF.gz" "$LOG/HOL-Boogie.gz" \
"$LOG/HOL-Library.gz" "$LOG/HOL-Nominal.gz" "$LOG/HOL-Statespace.gz" \
"$LOG/HOL-SPARK.gz"
isabelle keywords -k ZF \
"$LOG/Pure.gz" "$LOG/FOL.gz" "$LOG/ZF.gz"