code: function usage(grunt) {
    grunt.log.writeln('usage: grunt db:migrate[:up|:down|:create] [options]');
    grunt.log.writeln('  See ./migrations/README.md for more details');
    grunt.log.writeln();
    grunt.log.writeln('db:migrate:create Options:');
    grunt.log.writeln('  --name=NAME  Name of the migration to create');
    grunt.log.writeln();
    grunt.log.writeln('db:migrate[:up|:down] Options:');
    grunt.log.writeln('  --count=N         Max number of migrations to run.');
    grunt.log.writeln('  --dry-run         Prints the SQL but doesn\'t run it.');
    grunt.log.writeln('  --db-verbose      Verbose mode.');
    grunt.log.writeln('  --sql-file        Create sql files for up and down.');
    grunt.log.writeln('  --coffee-file     Create a coffeescript migration file.');
    grunt.log.writeln('  --migrations-dir  The directory to use for migration files.');
    grunt.log.writeln('                    Defaults to "migrations".');
    grunt.log.writeln('  --table           Specify the table to track migrations in.');
    grunt.log.writeln('                    Defaults to "migrations".');
  }
docs: Display command usage information.
  
  @param grunt Grunt object.