Ordinal number suffixes

[aaronpowell]

It'd be useful to be able to get just the ordinal suffix, so st, nd, rd, th for numbers, especially when working with dates.

Use case:

Assert.That("20th August 2014", Is.EqualTo(new DateTime(2014, 8, 20).<something>());

[MehdiK]

I like this.

I think this is a perfect fit for Humanize method. Maybe we should ask for this behavior using an optional param (which I don't really like) or create an overload with a format string (in which the formatter would have to be mandatory to differentiate it from the current Humanize method. Alternatively we could create a new method for this. ToOrdinalWords maybe?

[aaronpowell]

It begs the only question, how would you make that test pass?

[hazzik]

Just quick code:

public static string ToOrdinalWords(this DateTime dt) 
{
    return string.Format("{0} {1:MMMM yyyy}", dt.Day.Ordinalize(), dt);
}

UPD: fixed

[clairernovotny]

Merged in 3d71fd9