-FEATURES=$(git show -s --format=%s --no-color | sed -e 's/\([a-z0-9 -]*\):.*/\1/')
-KNOWN_TYPES="feature fix refactor style docs test make"
+FEATURES=$(git show -s --format=%s --no-color \
+ | sed -ne 's/^\([a-z0-9_ -]*\):.*$/\1/p')
+KNOWN_TYPES="feature fix refactor improvement style docs test make"