Fix `white-space` styles for `pre code` blocks
Fix `white-space` styles for `pre code` blocks

Signed-off-by: Robert Korulczyk <12e9293ec6b30c7fa8a0926af42807e929c1684f@korulczyk.pl>

SpaceCafe/deck,juliushaertl/deck,nextcloud/deck,juliushaertl/deck,SpaceCafe/deck,juliushaertl/deck,nextcloud/deck,SpaceCafe/deck,nextcloud/deck