Localize string for recent comments mismatched.

[lilyfan]

The localize string '%1$s on %2$s' (for recent comments) is not suitable for dashboard. This must be changed.

'%1$s on %2$s' is shown at line 4083 at ja.po,
and used at two places.

#: wp-admin/includes/dashboard.php:520

#: wp-includes/widgets.php:1401

This string is translated as "(投稿タイトル) に (コメント種別) より" (meanings: "for (title) from (comment type)") at the dashboard. This translation is no good, because "より" (== from) is redundant.

The root cause is that mismatch of purpose of "%1$s":
At dashboard.php: it represents comment type.
At widgets.php: it represents commenter author's name.

This localize string must be separated each other.

I suggest that '%1$s on %2$s' is only for dashboard.php, and for widgets.php, the existing string 'From %1$s on %2$s%3$' is suitable.

Fixed in [10680].