batterybar: Bad output if battery unplugged

[kb100]

@lathan

With my battery unplugged (laptop plugged into charger):

$ ./batterybar               
<span foreground="">■</span>
$ BLOCK_BUTTON=1 ./batterybar
 <span foreground="">%</span>
<span foreground="">■</span>

My acpi battery output is empty. Also note the extra space at the beginning of line 4.

[gangelop]

Hi @kb100 . Thnx. I'll try to look into this tomorrow from my work laptop. My macbook doesn't respect my freedom enough to allow me to remove the battery to see what acpi returns.

[gangelop]

It turns out, both my laptops are a bit weird in this area.

@kb100 could you tell me what the full output of the following commands is on your system when you have unplugged the battery and connected the charger?

acpi
acpi battery

[kb100]

Both acpi and acpi battery produce no output whatsoever when my battery is unplugged. Thus you need to account for if output is the empty string in your script. I would it expect it to be treated like the Unknown case.