echo-file: fix bat usage, all: improve styling #990

Job	Run time
login-shells-and-linting	6m 5s
container-test (ubuntu:latest)	9m 31s
fresh-macos-test (macos-15)	23m 0s
container-test (fedora:latest)	9m 58s
runner-test (ubuntu-24.04)	9m 58s
fresh-macos-test (macos-14)	21m 17s
container-test (debian:latest)	9m 16s
runner-test (ubuntu-22.04)	10m 4s
fresh-macos-test (macos-12)	25m 57s
container-test (alpine:latest)	11m 12s
runner-test (macos-15)	22m 14s
container-test (opensuse/leap)	11m 48s
runner-test (macos-14)	20m 41s
container-test (opensuse/tumbleweed)	9m 47s
runner-test (macos-12)	27m 49s
container-test (kalilinux/kali-rolling)	10m 10s
	3h 58m 47s

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