do you need backslash in line 10?

[pakair]

Line 10: do you need \
first run with \ gives a warning, second run without is clean.

user@cw:~$ xrandr | awk '/\ connected/'
awk: cmd. line:1: warning: regexp escape sequence `\ ' is not a known regexp operator
DVI-I-1 connected 1920x1080+3840+0 (normal left inverted right x axis y axis) 598mm x 336mm
HDMI-0 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 480mm x 270mm
DP-1 connected primary 1920x1080+1920+0 (normal left inverted right x axis y axis) 480mm x 270mm

user@cw:~$ xrandr | awk '/ connected/'
DVI-I-1 connected 1920x1080+3840+0 (normal left inverted right x axis y axis) 598mm x 336mm
HDMI-0 connected 1920x1080+0+0 (normal left inverted right x axis y axis) 480mm x 270mm
DP-1 connected primary 1920x1080+1920+0 (normal left inverted right x axis y axis) 480mm x 270mm
user@cw:~$