Expand warning message

Author: haltman-at

packages/core/lib/testing/testrunner.js

@@ -206,6 +206,10 @@ TestRunner.prototype.endTest = function(mocha, callback) {
  } catch (_) {
  //temporary HACK until we're using the new decoder
  self.logger.log(` Warning: event decoding failed`);
+ self.logger.log(
+ ` (This may be due to multiple events with same signature`
+ );
+ self.logger.log(` or due to unsupported data types)`);
  return;
  }