print("\tdb.commandHelp(name) returns the help for the command");
print("\tdb.copyDatabase(fromdb, todb, fromhost)");
print("\tdb.createCollection(name, { size : ..., capped : ..., max : ... } )");
print("\tdb.createUser(userDocument)");
print("\tdb.currentOp() displays currently executing operations in the db");
print("\tdb.dropDatabase()");
If you find that you add brackets after it, it will output normally. Implementation:
db.help()
, executedb.help
If you do, your situation will arise.