enhance the testsuite to verify that all other chars are NOT matched
enhance the testsuite to verify that all other chars are NOT matched

$ ./test-all-images.sh
I: 2657/2657 matched, 0 mismatched
I: 1110819/1110819 codepoints (expectedly) did not match, 0 mistakenly matched
I: all files matched, all others didn’t ⇒ all OK

movim/movim,edhelas/movim,edhelas/movim,movim/movim,movim/movim,edhelas/movim,edhelas/movim