keyboard-events: Drop newlines from `g_warning()`

g_warning newline terminates on it's own.

Signed-off-by: Guido Günther <guido.gunther@puri.sm>
18 jobs for drop-newlines in 60 minutes and 33 seconds (queued for 8 minutes and 32 seconds)
latest
Status Job ID Name Coverage
  Build
passed #315075
librem5
build:cross-debian-bullseye:i386

00:08:37

passed #315076
librem5
build:native-alpinelinux-edge

00:04:24

passed #315074
librem5
build:native-debian-bullseye

00:07:44

passed #315073
librem5
build:native-debian-buster

00:07:41

 
  Test+Docs
passed #315079
librem5
build-gtkdoc

00:03:19

passed #315081
librem5
check-license-headers

00:02:08

passed #315080
librem5
check-po

00:00:30

passed #315083
librem5
test:smoke:one-output

00:02:34

passed #315084
librem5
test:smoke:two-outputs

00:02:14

passed #315082
librem5
unit-test:native-alpinelinux-edge

00:00:34

passed #315078
librem5
unit-test:native-debian-bullseye

00:03:22

14.1%
passed #315077
librem5
unit-test:native-debian-buster

00:03:29

11.0%
 
  Package
passed #315086
librem5:arm64
package:deb-debian-bullseye:arm64

00:18:05

passed #315085
librem5
package:deb-debian-buster

00:07:32

passed #315087
librem5:arm64
package:deb-debian-buster:arm64

00:18:30

passed #315088
librem5
package:deb-pureos-amber

00:07:21

 
  Test Package
passed #315089
librem5
autopkgtest-debian-buster-package

00:01:20

passed #315090
librem5
lintian-debian-buster-package

00:00:37