The wc cli has been fixed up

[MarkReedZ]

In the wc cli I fixed up a couple bugs, added the files from arg, justified the output to match wc, and sped up the longest line search.

ref #97

$ time python ../StringZilla/cli/wc.py -L  --files0-from delme
        67 sz.js
     51648 enwik9.txt
        67 sz.js
       102 tst.js
     51884 total

real	0m1.184s
user	0m1.080s
sys	0m0.104s

$ time wc -L --files0-from delme
        67 sz.js
     51648 enwik9.txt
        67 sz.js
       102 tst.js
wc: ''$'\n': No such file or directory
     51648 total

real	0m4.327s
user	0m4.184s
sys	0m0.142s

[ashvardanian]

Does this relate to #139 in any way? cc @lborcard

[MarkReedZ]

No, haven't looked at split yet. I'm guessing for 139 he ran out of space. We can update the split code to print a better error message.