The \obeylines
command tells TeX to preserve line endings, which is useful for poetry and various other things. I can limit the effect of \obeylines
by wrapping it in a scope, like so:
{\obeylines
We obey, and end up on separate lines.
We obey.
}
We disobey, and end up on the same line.
We disobey.
This is practically always the way to go, or newlines breaking up formatting code will break up more than that. But, out of curiosity: is there also a command that resets TeX's handling of line endings? Googling for \disobeylines
turned up some roll-your-own implementations, but I'm curious whether Donald Knuth wrote an antidote into Plain TeX itself, too.