The SHOW CREATE PROCEDURE, SHOW CREATE FUNCTION and SHOW CREATE TRIGGER articles were documented with the change:
The output of these statements is not affected by the sql_quote_show_create server system variable. (see for example https://kb.askmonty.org/en/show-create-procedure/revision/18704/18357/)
I've reverted this, as this is not strictly-speaking true. The output is unreliably affected by the variable. In my testing, the output of ALL procedures was quoted when the MOST RECENT procedure was created with sql_quote_show=1, and the output of all was unquoted when the most recent procedure was created with sql_quote_show=0.
A related bug is: http://bugs.mysql.com/bug.php?id=12719 but that bug report doesn't fully explain the (current) situation. The bug was also noted as "can't fix" in the comments.
I didn't want to document the above without further testing (will the quoted status of functions being created affect procedures? Triggers? Events?), so just reverted for now, but it's worth further investigating.
ian