- Put selection in the single paragraph, and press code block button. Paragraph should change to code block. - Select multiple paragraphs and press code block icon. All blocks should be changed into one code block element with a multiple lines. - Change the middle paragraph into code block, select the preceding and the following paragraph, and press code block button. All selected blocks should be merged into one code block. - Try to create code block into block quote - it should work fine. - Try to create create a block quote into a table - it should work fine.