build: Fix Subject-line feature list extraction
Bang on sed until a better incantation appears.
Type: fix
Fixes:
#/bin/env bash
KNOWN_FEATURES=$(cat MAINTAINERS | sed -ne 's/^I:[[:space:]]*//p')
-FEATURES=$(git show -s --format=%s --no-color | sed -e 's/\([a-z0-9 -]*\):.*/\1/')
+FEATURES=$(git show -s --format=%s --no-color \
+ | sed -ne 's/^\([a-z0-9 -]*\):.*$/\1/p')
KNOWN_TYPES="feature fix refactor style docs test make"
TYPE=$(git show -s --format=%b --no-color | sed -ne 's/^Type:[[:space:]]*//p')
ERR="=============================== ERROR ==============================="
