"Not charging" is 12 characters; %12[a-zA-Z ] reads up to 12 chars
plus a NUL terminator (13 bytes) into a 12-byte buffer. Increase
state buffer to 13 in both battery_state and battery_remaining.

https://www.kernel.org/doc/html/latest/power/power_supply_class.html

Co-authored-by: drkhsh <me@drkhsh.at>
Signed-off-by: drkhsh <me@drkhsh.at>

The current version displays the remaining time as 'n/a'.

Fixes this regression introduced in 69b2487650782f135db76078c4a7fb841cb936ac
where current_now and power_now were incorrectly replaced with current and
power when they were moved to a macro.

Fixes coding style. Formatting commits suck, incoherent coding style
sucks more.
https://suckless.org/coding_style/

Fixes coding style. Formatting commits suck, incoherent coding style
sucks more.
https://suckless.org/coding_style/

Except stated otherwise in comment.

Fixes coding style. Formatting commits suck, incoherent coding style
sucks more.
https://suckless.org/coding_style/

Fixes up overly complicated line, by splitting up logic

Long, wrapped, multi-line if statements suck to read.
This fixes readability in the worst places by packing format strings for
paths into defines.

this gives the compiler a chance to check weather the prototype and
definiton matches or not, which would catch issues like 3c47701.

Exists on various ThinkPads. Seems to be both a synonym for "full".

Tested on:
- ThinkPad T500 (Spenser Truex <truex@equwal.com)
- ThinkPad T420 (drkhsh <me@drkhsh.at)