Remote whitespace at the ends of lines.
Remove blank lines from the ends of files.
Change modes on source files so that they
are not executable.
Signed-off-by: Dan Cross <cross@gajendra.net>
According to <https://askubuntu.com/a/309146>, use of `/proc/acpi` to
get battery usage is deprecated. This commit replaces the two files from
this API with the single file `/sys/class/power_supply/BAT0/capacity`,
simultaneously removing the need to calculate battery percentage.
