Re: C-o

[Alfred M. Szmidt]

   > > A lot of times I used it due to the expectation that RET will reindent
   > > the current line and will do so incorrectly (which happens).
   > >
   > > Looks like C-j is a possible alternative, but somehow that didn't grow
   > > into the muscle memory, and in some buffers it does something
   > > different (e.g. inside *scratch*).
   > 
   > For a less embellished alternative to C-j or RET, C-q C-j is probably
   > the better option.

   Only if you are young enough to not have C-j burned into your muscle
   memory as what RET does in most places in Emacs nowadays.

There are also a few where there is quite a big difference, e.g., in
any "REPL" like setting where C-j and RET have very different
behaviour.  Say, a shell buffer... RET behaviour depends on the mode
more often than not, while C-o and C-j generally don't. 

   Old Sun keyboards had an LFD key, and Emacs used it a lot in old
   versions.  Which made C-j anything but a simple newline key.

   And having to quote a key is a sign of a key-binding bug in my book.