battery regexp breaks with two batteries

[iwkse]

With a lenovo thinkpad:

$ acpi -b Battery 0: Not charging, 97% Battery 1: Discharging, 19%, 01:21:13 remaining
the current regexp can't match "Not charging"

# fail on unexpected output if ($acpi !~ /: (\w+), (\d+)%/) { die "$acpi\n"; }
Fixes that works also for double batteries:

# fail on unexpected output if ($acpi !~ /: (\w+\s*)*, (\d+)%/) { die "$acpi\n"; }

[scrambledlegs]

Thanks for this fix! I had the same issue on an old T450s