fix IPython.embed
without this change, IPython.embed throws the following traceback:
File "explete.py", line 9, in dump_inputs
IPython.embed()
File "/home/pi/code/ipython/IPython/terminal/embed.py", line 287, in embed
config = load_default_config()
File "/home/pi/code/ipython/IPython/terminal/ipapp.py", line 379, in load_default_config
for cf in Application._load_config_files("ipython_config", path=profile_dir):
File "/home/pi/code/ipython/IPython/config/application.py", line 527, in _load_config_files
log.debug("Loaded config file: %s", loader.full_filename)
AttributeError: 'NoneType' object has no attribute 'debug'
@Carreau was the last to poke around in this part of the code, so
pinging him, just in case
