Simplifications to writing Python lldb commands as of Xcode 10.2

my_command.py

##
## Python commands before
##

def my_command(debugger, input, ctx, result, _):
    # do stuff
    pass

def __lldb_init_module(debugger, _):
    debugger.HandleCommand(
        "command script add --help 'Help text here' --function my_command.my_command my_command"
    )

##
## Now with Xcode 10.2
##

import lldb

# The lldb.command() decorator creates a `my_command` command.
@lldb.command()
def my_command(debugger, input, ctx, result, _):
    "Help text is the function docstring"
    # do stuff
    pass