ObjFW  Diff

	return new;
}

- (OFString*)uppercaseString
{
	OFMutableString *new = [[self mutableCopy] autorelease];

	[new upper];
	[new uppercase];

	[new makeImmutable];

	return new;
}

- (OFString*)lowercaseString
{
	OFMutableString *new = [[self mutableCopy] autorelease];

	[new lower];
	[new lowercase];

	[new makeImmutable];

	return new;
}

- (OFString*)stringByDeletingLeadingWhitespaces