Bug: op in datatype dec

[Stephen Weeks]

> MLton does not accept the following declaration:
> 
> 	datatype t = op X
> 
> (regardless of whether X actually is infix or not.)

Thank you for the bug report.  The bug was fixed internally on 2000-10-19 and
will appear in the next release of MLton, hopefully in January.  The same bug
fix also fixed a similar problem with exception declarations, like
	exception op E = op Fail
Let us know if you find any other problems with MLton's grammar.  Thanks.