Singular prefix/suffix on number field do not get translated.

Problem/Motivation

When using the number field, eg. with the decimal formatter, and adding a prefix and suffix, the prefix and suffix do not get translated.

Proposed resolution

In code, the number.module uses the format_plural()-function to format multiple prefixes and suffixes. For single prefix/suffix, it simply returns the prefix/suffix value. There should be a t-function on that value.

Code in number.module, line 298:

Original code:

$prefix = (count($prefixes) > 1) ? format_plural($item['value'], $prefixes[0], $prefixes[1]) : $prefixes[0];
$suffix = (count($suffixes) > 1) ? format_plural($item['value'], $suffixes[0], $suffixes[1]) : $suffixes[0];

Code in attached patch:

$prefix = (count($prefixes) > 1) ? format_plural($item['value'], $prefixes[0], $prefixes[1]) : t($prefixes[0]);
$suffix = (count($suffixes) > 1) ? format_plural($item['value'], $suffixes[0], $suffixes[1]) : t($suffixes[0]);

Remaining tasks

Verify and commit patch to core dev-channel.