K 10
svn:author
V 6
arrowd
K 8
svn:date
V 27
2019-06-02T09:02:21.482890Z
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svn:log
V 197
lang/ghc: Update to 8.6.4 and bump PORTREVISIONs for Haskell ports.

While there, fix build with DOCS=off.

Approved by:	tcberner (mentor)
Differential Revision:	https://reviews.freebsd.org/D20464

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