Improve design of warning output

Dangerfile

@@ -2,7 +2,7 @@ require "yaml"
 
 # Make sure no page got removed
 if git.diff_for_file("mkdocs.yml")
-  warn("mkdocs.yml was modified - make sure no modification was made by mistake")
+  warn("<code>mkdocs.yml</code> was modified - make sure no modification was made by mistake")
 
   patch = git.diff_for_file("mkdocs.yml").patch
 
@@ -13,7 +13,7 @@ if git.diff_for_file("mkdocs.yml")
   lines.each do |current_line|
     if current_line.start_with?("-")
       page_name = current_line.match(/\-.*\- (.*)/)[1]
-      warn("It seems like the page '#{page_name}' got removed from mkdocs.yml, we don't want to remove any public links. Instead please add a redirect to the new page")
+      warn("It seems like the page <code>#{page_name}</code> got removed from mkdocs.yml, we don't want to remove any public links. Instead please add a redirect to the new page.")
     end
   end
 end