ASCII/ANSI -> UTF-8, CR/LF -> LF, Tab -> 4 Spaces, Trim trailing whitespace, Newline at EOF

convert.sh

#!/bin/bash
if [[ $# > 0 ]]; then
    for File in $@; do
        iconv --to-code=UTF-8 "$File"
        sed -i 's/\r$//g' "$File"
        expand --initial --tabs=4 "$File"
        sed -i 's/[ ]+$//g' "$File"
        if [[ $(tail --lines=1 "$File") != "" ]]; then
            : >> $File
        fi
    done
fi