lib/Tools/update_semicolons

clarified NEWS: document_files are officially required since Isabelle2014, but the absence was tolerated as legacy feature;

#!/usr/bin/env bash
#
# Author: Makarius
#
# DESCRIPTION: remove obsolete semicolons from theory sources


## diagnostics

PRG="$(basename "$0")"

function usage()
{
  echo
  echo "Usage: isabelle $PRG [FILES|DIRS...]"
  echo
  echo "  Recursively find .thy files and remove obsolete semicolons."
  echo
  echo "  Old versions of files are preserved by appending \"~~\"."
  echo
  exit 1
}


## process command line

[ "$#" -eq 0 -o "$1" = "-?" ] && usage

SPECS="$@"; shift "$#"


## main

find $SPECS -name \*.thy -print0 | \
  xargs -0 "$ISABELLE_TOOL" java isabelle.Update_Semicolons