[GHC] #11767: Add @since annotations for base instances

[GHC]

#11767: Add @since annotations for base instances
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        Reporter:  bgamari           |                Owner:
            Type:  task              |               Status:  new
        Priority:  normal            |            Milestone:  8.2.1
       Component:  Core Libraries    |              Version:  7.10.3
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:  #11768            |  Differential Rev(s):
       Wiki Page:                    |
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Changes (by bgamari):

 * related:   => #11768


@@ -7,1 +7,1 @@
- annotations. We'll need to work out some mechanism for this.
+ annotations. We'll need to work out some mechanism for this (see #11768).

New description:

 Up until now we haven't been adding `@since` annotations for instances
 that we add to `base` (see Phab:D2051 for the discussion that spurred this
 ticket). We should try to get better coverage here.

 Unfortunately, we currently have no way to place Haddock comments on
 derived instances, which limits our ability consistently add these
 annotations. We'll need to work out some mechanism for this (see #11768).

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/11767#comment:1>
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