fix(ssh-keygen): make work with custom IFS

Co-authored-by: Koichi Murase <myoga.murase@gmail.com>

Author: scop

completions/ssh-keygen

@@ -5,6 +5,7 @@ _comp_cmd_ssh_keygen()
     local cur prev words cword comp_args
     _comp_initialize -n := -- "$@" || return
 
+    local IFS=$' \t\n' # for ${words[*]}
     local noargopts='!(-*|*[ aCIJjMNPSVWzbEFRDwfGKsTmnOrtY]*)'
     # shellcheck disable=SC2254
     case $prev in