Do not pad4 emty lines

dotfiles/bash/main.bashrc

 alias open='gnome-open'
 alias diff='diff -u'
 alias dmesg='dmesg --time-format iso'
-alias pad4='sed -e "s/^/    /"'
+alias pad4='sed -e "/./s/^/    /"'
 alias grep='grep --color --binary-files=without-match'
 alias sc='se --direction=encz.cz'
 alias ts='ts "%F %T"'