Returns a right-justified copy of self.

If integer argument size is greater than the size (in characters) of self, returns a new string of length size that is a copy of self, right justified and padded on the left with pad_string:

'hello'.rjust(10)       # => "     hello"
'hello  '.rjust(10)     # => "   hello  "
'hello'.rjust(10, 'ab') # => "ababahello"
'тест'.rjust(10)        # => "      тест"
'こんにちは'.rjust(10)    # => "     こんにちは"

If size is not greater than the size of self, returns a copy of self:

'hello'.rjust(5, 'ab')  # => "hello"
'hello'.rjust(1, 'ab')  # => "hello"