There was one level of parentheses too much, leading to errors when the script
was invoked due to trying to apply e.g., 0 or #t. So either use begin, or
strip one level, as appropriate.
* gnu/services/power.scm (apcupsd-event-handlers): Fix all G-expressions.
Signed-off-by: Andreas Enge <andreas@enge.fr>
c934a69a96