Google Authenticator iRule Verification

Here's another example:

Before:

set cookie_expire_date [clock format [expr [clock seconds] + $cookie_expire] -format "%a, %d-%b-%Y %H:%M:%S GMT" -gmt true]

After:

set cookie_expire_date [clock format [expr {[clock seconds] + $cookie_expire}] -format "%a, %d-%b-%Y %H:%M:%S GMT" -gmt true]