FMSLogo Code

Clean up the formatting to make the file look nicer.

Update russian startup script to the latest translations by Igor Baglaev.

Update the test pass baseline based on official 6.23.0 test pass.

Update the expected version for 6.23.0.

Add in a translation that was accidently overwritten.

Copy the changes from 6.23.0 into the changelog for the next release.

Bump the version to 6.23.0 for the next formal release.

Add a regression test for bug #2563317, which is that READCHARS 2000000000 would crash because it didn't check the return value of malloc(2000000000).

Fix a trivial memory leak in readchars when reading zero bytes. This was done by moving the logic for freeing the string buffer when make_strnode_no_copy() returns Null_Word into make_strnode_no_copy().

Fix a theoretical memory leak in an error path of lreadchars() (in practice, I don't think this code path is reachable).