He should add use utf8; if and only if his source code is UTF-8.
He should omit use utf8; if and only if his source code is iso-8859-1.

There's absolutely no indication as to which is correct here, so I don't see how you can suggest one over the other.

In reply to Re^3: How to write a utf-8 file by ikegami
in thread How to write a utf-8 file by srikrishnan

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