I accidentally discovered that the key combination will concatenate the current line and the next line. However, I do not recall it being mentioned in the
quickref. After a quick Google, I did not find anything. Do any have a clue about where in the
documents can I find more about this key combination?
BTW, I have confirmed that this is not mapped in the
With the help from a comment, (Curiously, I saw it in a message. But after I opened the website, it disappeared.) I found that I am actually using the
<J> key to join lines. Thanks to this post.
J in visual mode provides extra capabilities. See
:help v_J. (Thanks to @Antony's comment.)