[GHC] #15017: Come up with a better name for `tcExtendTyVarEnv2`

[GHC]

#15017: Come up with a better name for `tcExtendTyVarEnv2`
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        Reporter:  mpickering        |                Owner:  (none)
            Type:  task              |               Status:  new
        Priority:  normal            |            Milestone:  8.4.3
       Component:  Compiler          |              Version:  8.2.2
      Resolution:                    |             Keywords:
Operating System:  Unknown/Multiple  |         Architecture:
                                     |  Unknown/Multiple
 Type of failure:  None/Unknown      |            Test Case:
      Blocked By:                    |             Blocking:
 Related Tickets:                    |  Differential Rev(s):
       Wiki Page:                    |
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Comment (by sighingnow):

 Also `scopeTyVars2`.

 What about to rename `scopeTyVars2` to `scopeTyVarsWithName` and
 `tcExtendTyVarEnv2` to `tcExtendTyVarEnvWithName` ?

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Ticket URL: <http://ghc.haskell.org/trac/ghc/ticket/15017#comment:1>
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