Akim Demaille ea138cd1f1 cex: use usual routines for diagnostics about S/R conflicts ...

See previous commit.  We go from

    input.y: warning: 3 reduce/reduce conflicts [-Wconflicts-rr]
    Shift/reduce conflict on token "⊕":
      Example              exp "+" exp • "⊕" exp
      Shift derivation
        exp
        ↳ exp "+" exp
                  ↳ exp • "⊕" exp

to

    input.y: warning: 3 reduce/reduce conflicts [-Wconflicts-rr]
    input.y: warning: shift/reduce conflict on token "⊕" [-Wcounterexamples]
      Example              exp "+" exp • "⊕" exp
      Shift derivation
        exp
        ↳ exp "+" exp
                  ↳ exp • "⊕" exp

with an hyperlink on -Wcounterexamples.

* src/counterexample.c (counterexample_report_shift_reduce):
Use complain.
* tests/counterexample.at, tests/diagnostics.at, tests/report.at:
Adjust.

2020-07-20 06:45:27 +02:00

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