Confluence tests for new rules fail

[deemp]

Details

@eyihluyc, @Anatolay, I ran the tests locally and discovered this critical pair.

  test/Language/EO/Rules/PhiPaperSpec.hs:341:9: 
  1) Language.EO.Rules.PhiPaper, New Yegor's rules, Are confluent (via QuickCheck)
       Falsified (after 692 tests and 6 shrinks):
         Source term:
           ⟦
           φ ↦ ⟦
             ρ ↦ ⟦
               v5 ↦ ∅
             ⟧
             (
               v5 ↦ ⟦ ⟧
             )
           ⟧
           .ρ
         ⟧
         
         Critical pair:
           Using rule 'DOT': ⟦
           φ ↦ ⟦
             v5 ↦ ∅
           ⟧
           (
             v5 ↦ ⟦ ⟧
           )
           (
             ρ ↦ ⟦
               ρ ↦ ⟦
                 v5 ↦ ∅
               ⟧
               (
                 v5 ↦ ⟦ ⟧
               )
             ⟧
           )
         ⟧
         
           Using rule 'COPY': ⟦
           φ ↦ ⟦
             ρ ↦ ⟦
               v5 ↦ ⟦ ⟧
             ⟧
         ()
           ⟧
           .ρ
         ⟧
         

  To rerun use: --match "/Language.EO.Rules.PhiPaper/New Yegor's rules/Are confluent (via QuickCheck)/" --seed 1547631552

Randomized with seed 1547631552

Subtasks

• Try to reproduce with the eo-phi-normalizer on master
• Try running 2000 tests to discover other critical pairs