Fix broken Xiec / Xieee commands
Prevent splitting of System Info

to prevent it from appearing like this:

>>>: ### XS-1541/XD2031 v0.9.2 ###
>>>: CMD:'XU=9'
>>>: SETTING UNIT# TO 9 ON iec
>>>: CMD:'XU=9'
>>>: SETTING UNIT# TO 9 ON ieee
>>>: SETTING UNIT# TO 9 ON ieee
>>>: , 14745 kHz
>>>:
>>>: Fuses: l=FF h=D4 e=FC l=FF
>>>