i18n: Use %s placeholders in instead of `mail()`

[ramiy]

Old translation string:

• The email could not be sent. Possible reason: your host may have disabled the mail() function.

New translation string:

• The email could not be sent. Possible reason: your host may have disabled the %s function.

Translators cam change the function name by mistake while translating the string. The best practice is to replace the mail() function with a %s placeholder.

The patch also adds translators comments.

[SergeyBiryukov]

The string in wp-login.php was changed in [45404]. I'm not sure yet whether the other string should also be updated for consistency (it depends on where it is displayed and whether it supports HTML). A new ticket should probably be opened for that.

For now, going with 47255.patch​ seems fine.

[ramiy]

@SergeyBiryukov Why should we care whether it supports HTML? the strings has no HTML.

[SergeyBiryukov]

Replying to ramiy:

Why should we care whether it supports HTML? the strings has no HTML.

The current one doesn't have HTML, but the one introduced in [45404] does. I was wondering if that new string could also be used in WP_Recovery_Mode_Email_Service. For now, left a comment on #39110: comment:17:ticket:39110.

[SergeyBiryukov]

In 45447:

I18N: Remove PHP function name from translatable string in WP_Recovery_Mode_Email_Service.

Props ramiy.
Fixes #47255.