update racket HISTORY.txt for v7.4

This commit is contained in:
Matthew Flatt 2019-07-23 13:01:31 -06:00
parent 05c82d877c
commit c1bc49e45b

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Version 7.4 Version 7.4, July 2019
Disabled single-flonum reading by default and added Disabled single-flonum reading by default and added
`read-single-flonum` and `single-flonum-available?` `read-single-flonum` and `single-flonum-available?`
Bug repairs and other changes noted in the documentation
Version 7.3, May 2019 Version 7.3, May 2019
Bug repairs and other changes noted in the documentation Bug repairs and other changes noted in the documentation