anchor.diff:            // we need to run update-packages to recapture the transitive deps.
             printStatus(
               'Warning: pubspec in ${directory.path} has invalid dependencies. '
  -            'Please run "flutter update-packages" --force-upgrade to update them correctly.'  
  +            'Please run "flutter update-packages" --force-upgrade to update them correctly.'
             );
            } else {
              // everything is correct in the pubspec.
  
positive.code:           // upgrade again to compute it.
            printError(
              'Warning: pubspec in ${directory.path} has out of date dependencies. '
              'Please run "flutter update-packages --force-upgrade" to update them correctly.'  
            );
            needsUpdate = true;
          }
  
negative.code:       ..insertAll(endOfDirectDependencies, transitiveDependencyOutput)
        ..add('')
        ..add('$kDependencyChecksum$checksumString');
  
      // Remove trailing lines.
      while (output.last.isEmpty)
        output.removeLast();
  