Use plural form for "%d more" text

[lslezak]

Problem

• In English the text "%d more" is the same for any number, like "3 more" or "5 more".
• But for example in Czech it translates as "3 další" and "5 dalších". So we need the plural form to translate it correctly.

Solution

• Use the plural form for this text.

[coveralls]

coverage: 75.038%. remained the same
when pulling d5f9677 on plural-form
into 3482027 on master.

[mvidner]

Good catch, LGTM