If you post formatted code, it should not do some basic formatting on it. You can see the original discussion that prompted this at Discourse Annoyances.
"it should now do some basic formatting on it" ??
Test of a block of code surrounded by [code] ... [/code] BBCode tags
SELECT * FROM MyTable WHERE FOO = 'BAR'
Test of a block of code pasted in and then selected and then press Control-K or the [</>] button (which basically prefixes each line with 4-spaces:
SELECT *
FROM MyTable
WHERE FOO = 'BAR'
Both seem to work well, thanks @graz
Please to say that the change appears to be retrospective so code blocks on older threads are showing as colour-coded This was the earliest thread I found with a code block, from 10-May