Got warning error when enable dev mode

[honglt]

Joomla 3.9.3, php7.3
Enable development mode = Maximum
In template manager >> T3 Blank BS3 template >> Enable dev mode
Go to frontend to got the warning error:
Warning: "continue" targeting switch is equivalent to "break". Did you mean to use "continue 2"? in /home/joom/joomlart/www/jadev2_data/sites/auto/qs.t3blankj3x.1551242218/plugins/system/t3/includes/lessphp/less/less.php on line 9386

[thomaslanger]

Simple replace continue with break on all Lines with warning.
In PHP 8 continue in switsch will result in a Compile-Error
continue_on_switch_deprecation