show another detail on test failure

Dependencies

• [2] ORRSP7FV deduce test names on failures
• [3] 4DBXBOOP compare nested tables
• [4] AVTNUQYR basic test-enabled framework

Change contents

• replacement in test.lua at line 17
  [2.23365]→[3.312:346](∅→∅),[3.312]→[3.312:346](∅→∅)
  − error(msg..'; got "'..x..'"')
  [2.23365]

  [3.346]
  + error(msg..'; should be "'..expected..'" but got "'..x..'"')