Disable writeroom in markdown-mode

+org.el

@@ -38,6 +38,7 @@
       org-babel-default-lob-header-args '((:exports . "both")))
 ;; Enter writeroom-mode in all org files
 (add-hook 'org-mode-hook 'global-writeroom-mode)
+(setq writeroom-major-modes '(org-mode))
 ;; Respect LANGUAGE export variable
 (add-to-list 'org-latex-packages-alist '("AUTO" "babel" t ("pdflatex")))
 ;; Don't evaluate code blocks on export