| Fri, 13 Mar 2020 16:04:27 +0100 | wenzelm | allow slightly odd "' " in mixfix as documented (introduced in 55754d6d399c, but broken in be8a8d60d962); | changeset | files |
| Sat, 14 Mar 2020 15:58:51 +0000 | paulson | tidied up a few little proofs | changeset | files |
| Thu, 12 Mar 2020 23:05:11 +0100 | wenzelm | updated for release; | changeset | files |