The following sed returns (...| od -c) without ...|cut -d "\n" -f
0000000 1 9 2 \n 2 5 0 \n 0000010 Pseudocode
# http://unix.stackexchange.com/a/290407/16920 sed -n -f - /usr/share/X11/xkb/symbols/us <<END_SED | cut -d "\n" -f1 /xkb_symbols "dvorak" {/,/^};/{ /xkb_symbols "dvorak" {/= /^};/= } END_SED but blank output.
System: Ubuntu 16.04 64 bit
Hardware: Macbook Air 2013-mid
Sed: 4.2.2
Cut, od: Coreutils 8.25
... | head -n 1