=begin
= Script Encoding Summary
from [[ruby-core:15391]]
| Normal script case | script encoding | default external |
|---|---|---|
| no -K -E, no magic comment | US-ASCII | locale |
| no -K -E, have magic comment | magic comment | locale |
| have -E, no magic comment | US-ASCII | -E |
| have -E, have magic comment | magic comment | -E |
| have -K, no magic comment | -K | -K |
| have -K, have magic comment | magic comment | -K |
| -e and stdin case | script encoding | default external |
|---|---|---|
| no -K -E, no magic comment | locale | locale |
| no -K -E, have magic comment | magic comment | locale |
| have -E, no magic comment | locale | -E |
| have -E, have magic comment | magic comment | -E |
| have -K, no magic comment | -K | -K |
| have -K, have magic comment | magic comment | -K |
=end