Apply some @grayjay comments

Author: yvan-sraka

cabal-install-solver/src/Distribution/Solver/Modular.hs

@@ -122,17 +122,17 @@ solve' :: SolverConfig
        -> Set PN
        -> Progress SolverTrace String (Assignment, RevDepMap)
 solve' sc cinfo idx pkgConfigDB pprefs gcs pns =
-    toProgress $ retry (runSolver printFullLog sc) handleFailure
+    toProgress $ retry (runSolver printFullLog sc) createErrorMsg
   where
     runSolver :: Bool -> SolverConfig
               -> RetryLog SolverTrace SolverFailure (Assignment, RevDepMap)
     runSolver keepLog sc' =
         displayLogMessages keepLog $
         solve sc' cinfo idx pkgConfigDB pprefs gcs pns
 
-    handleFailure :: SolverFailure
+    createErrorMsg :: SolverFailure
                    -> RetryLog SolverTrace String (Assignment, RevDepMap)
-    handleFailure failure@(ExhaustiveSearch cs _cm) =
+    createErrorMsg failure@(ExhaustiveSearch cs _cm) =
       if asBool $ minimizeConflictSet sc
       then continueWith (mkErrorMsg ("Found no solution after exhaustively searching the "
                           ++ "dependency tree. Rerunning the dependency solver "
@@ -153,7 +153,7 @@ solve' sc cinfo idx pkgConfigDB pprefs gcs pns =
                        ++ finalErrorMsg sc failure
       else
         fromProgress $ Fail $ rerunSolverForErrorMsg cs ++ finalErrorMsg sc failure
-    handleFailure failure@BackjumpLimitReached     =
+    createErrorMsg failure@BackjumpLimitReached     =
         continueWith
              (mkErrorMsg ("Backjump limit reached. Rerunning dependency solver to generate "
               ++ "a final conflict set for the search tree containing the "

cabal-install-solver/src/Distribution/Solver/Modular/Log.hs

@@ -25,7 +25,7 @@ displayLogMessages :: Bool
                    -> RetryLog SolverTrace SolverFailure a
 displayLogMessages keepLog lg = fromProgress $
     if keepLog
-    then groupMessages progress
+    then summarizeMessages progress
     else foldProgress (const id) Fail Done progress
   where
     progress = toProgress lg

cabal-install-solver/src/Distribution/Solver/Modular/Message.hs

@@ -3,7 +3,7 @@
 module Distribution.Solver.Modular.Message (
     Message(..),
     SolverTrace(..),
-    groupMessages,
+    summarizeMessages,
   ) where
 
 import qualified Data.List as L
@@ -78,7 +78,7 @@ displayMessage :: Log -> String
 displayMessage (PackageGoal qpn gr) = "next goal: " ++ showQPN qpn ++ showGR gr
 displayMessage (RejectF qfn b c fr) = "rejecting: " ++ showQFNBool qfn b ++ showFR c fr
 displayMessage (RejectS qsn b c fr) = "rejecting: " ++ showQSNBool qsn b ++ showFR c fr
-displayMessage (Skipping' cs) = showConflicts cs
+displayMessage (Skipping' cs) = "skipping: " ++ showConflicts cs
 displayMessage (TryingF qfn b) = "trying: " ++ showQFNBool qfn b
 displayMessage (TryingP qpn i mgr) = "trying: " ++ showQPNPOpt qpn i ++ maybe "" showGR mgr
 displayMessage (TryingS qsn b) = "trying: " ++ showQSNBool qsn b
@@ -123,8 +123,8 @@ displayMessage (RejectMany qpn is c fr) = "rejecting: " ++ L.intercalate ", " (m
 -- The log contains level numbers, which are useful for any trace that involves
 -- backtracking, because only the level numbers will allow to keep track of
 -- backjumps.
-groupMessages :: Progress Message a b -> Progress SolverTrace a b
-groupMessages = go 0
+summarizeMessages :: Progress Message a b -> Progress SolverTrace a b
+summarizeMessages = go 0
   where
     -- 'go' increments the level for a recursive call when it encounters
     -- 'TryP', 'TryF', or 'TryS' and decrements the level when it encounters 'Leave'.