Am I the only one seeing this? It appears to be coming from s_copyright.

I've been seeing some slight issues with the recent s_all changes. Basically, I end up with thousands of __wt.* files in my top level WT directory after the build completes. (These are from AWS, but I see it on my Mac too)

$ ls __wt* | wc -l
4264

Also when I run my build script, which runs s_all every time, I am getting "errors" like this (does not matter if I clear out the __wt files or not):

$ r -a
rebuild 
run s_all
dist/s_all run started...
####################### ERROR ############################
s_all run of: sh ./s_copyright resulted in:
    /home/sue/wt.1962/dist
    /home/sue/wt.1962/dist
    /home/sue/wt.1962/dist
    /home/sue/wt.1962/dist
    /home/sue/wt.1962/dist
    /home/sue/wt.1962/dist
    /home/sue/wt.1962/dist
    /home/sue/wt.1962/dist
    /home/sue/wt.1962/dist
    /home/sue/wt.1962/dist
    /home/sue/wt.1962/dist
    /home/sue/wt.1962/dist
    /home/sue/wt.1962/dist
    /home/sue/wt.1962/dist
...

Even if I remove them all before rebuilding, I still get the s_copyright "error" above. And the error is not helpful. Each __wt file is copyright stuff (admittedly I didn't look at all 4264 files). Even if s_copyright doesn't fail I'm still left with the files.

The handing of __wt* files in the scripts does not seem to have changed with the parallelization though so I'm not sure why they're now getting left.