Files
ESPAsyncWebServer/extras

ehg.c (ehg.exe): Tool to generate C-code array from file' bytes
Based on https://github.com/TheLivingOne/bin2array/ and compiled with TynyCC

rehg.c (rehg.exe): Tool to reverse C-code array generated by ehg.exe back to a file
Based on https://github.com/birkett/cbintools/tree/master/c2bin  and compiled with TynyCC

Tools used (on Win 10):

https://www.7-zip.org (install 7z and use gzip - command line)
https://nodejs.org   
(install node and npm install html-minifier-terser -g,  npm install -g github-files-fetcher)
https://www.npmjs.com/package/html-minifier-terser 
https://www.npmjs.com/package/github-files-fetcher  

Optional:
https://bellard.org/tcc/ (to compile ehg.c and rehg.c)

Provided batch files (MS Win)

do.bat: Generates edit.htm.gz.h

undo.bat: Reverts edit.htm from C array header to file (still minified!)

update_ace.bat: Updates acefull.js.gz from latest Github sources