At some point (and I dont know what it triggered) HA decided to print stuff with color escapes in the log file:
Mar 20 08:07:35 pi3HA hass[2395]: #033[32m2018-03-20 08:07:35 INFO (MainThread) [homeassistant.core] Bus:Handling <Event state_changed[L]: old_state=<state sensor.fibaro_system_fgt001_heat_controller_sourcenodeid_4=0; value_instance=2, new_entity_id=sensor.fibaro_system_fgt001_heat_controller_sourcenodeid, friendly_name=FIBARO System FGT001 Heat Controller SourceNodeId, unit_of_measurement=, old_entity_id=sensor.fibaro_system_fgt001_heat_controller_sourcenodeid_6_2_2, hidden=True, node_id=6, value_index=2, value_id=144115188182564897 @ 2018-03-20T08:06:43.064454+01:00>, new_state=<state sensor.fibaro_system_fgt001_heat_controller_sourcenodeid_4=0; value_instance=2, new_entity_id=sensor.fibaro_system_fgt001_heat_controller_sourcenodeid, friendly_name=FIBARO System FGT001 Heat Controller SourceNodeId, unit_of_measurement=, old_entity_id=sensor.fibaro_system_fgt001_heat_controller_sourcenodeid_6_2_2, hidden=True, node_id=6, value_index=2, value_id=144115188182564897 @ 2018-03-20T08:07:35.010209+01:00>, entity_id=sensor.fibaro_system_fgt001_heat_controller_sourcenodeid_4>#033[0m
How can this be disabled? I am running HA 0.64.3.