RegExr describes itself as an online tool to learn, build, & test Regular Expressions:
Results update in real-time as you type.
Roll over a match or expression for details.
Validate patterns with suites of Tests.
Save & share expressions with others.
Use Tools to explore your results.
You might want to give fossil a try, which is basically a DVCS somewhat akin to git, just contained in a single executable, and also comprising a web UI and integrated Wiki.
For example, here you could have a look on time line showing branches in a visual manner. You could just regard its whole homepage as an example.
While not a CMS in the strict sense it ...
Finally, I used Google Drive with its direct download parameters:
Google Drive file ID is inside the shareable link when you share a file publicly. E.g. file ID would be something like 1lWCDMGcu2kCRZZMAnl1lJMB_QNirWUcl.