bug#42149: Substring and flex completion ignore implicit trailing ‘any’

[Stefan Monnier]

> This is one of them.
>
>     (ert-deftest completion-pcm-test-3 ()
>       ;; Full match!
>       (should (eql
>                (completion--pcm-score
>                 (car (completion-pcm-all-completions
>                       "R" '("R" "hello") nil 1)))
>                1.0)))

BTW, a good improvement to the tests would be to replace the score
equality tests with score ordering comparisons (like "score of foo >
score of bar") since it'd be perfectly OK to use a different scoring
system which gives different values as long as the relative ordering is
still obeyed.


        Stefan