Plugin Directory: Use _n() for "translated into these locales" string

[SergeyBiryukov]

'%1$s has been translated into these %2$d locales: %3$s.' needs _n() to be translated properly.

Additionally, the 1 === count( $locales ) case should be checked separately, see the ​note in Codex.

[ocean90]

In 5372:

Plugin Directory: Use _n() for "translated into these locales" string.

Props SergeyBiryukov.
Fixes #2694.

[Presskopp]

Am I right that the first line (singular) is just a 'placeholder' and never used? Translating it, it confuses me, because these %2$d locales is not singular. Can this be clearified more?

'%1$s has been translated into these %2$d locales: %3$s.',
'%1$s has been translated into these %2$d locales: %3$s.',

[SergeyBiryukov]

Replying to Presskopp:

Am I right that the first line (singular) is just a 'placeholder' and never used?

It would be used in languages where the singular form is used not just for 1 item, but also for 21, 31 items, etc. (Russian and some others).

In English or German it won't be used, just translate it to whatever makes the most sense :)