cmds: add flags to supress cosmetic eof newline in output

[jbenet]

sometimes, it is nice to make commands add a newline to their output. Sometimes, we want that newline not to be there (because we want exactly the file contents. It would be nice to have one flag -- the same across commands -- that suppresses this newline. I think there is something like this in git, not sure.

[chriscool]

Git is not very consistent. Some commands have a --raw flag and some other commands have a -p flag (which means pretty). Also sometimes even the --raw output is not completely raw.

I also think the --raw is more for porcelain commands like "git log" and the -p for plumbing commands like "git cat-file". (But "git log" also has "--pretty" which is the same as "--format".)

Anyway I would say that it is not worth having a flag just to add or remove a newline. So I think it should be a bug if a command only adds a newline when it outputs the content of a file (or the content of any object that is stored).

Otherwise I think it is ok for commands, especially porcelain commands, to add some newlines to their output and even make the output prettier by adding more stuff.

Hope this helps.

[chriscool]

By the way I forgot that some Git commands also have a -v or --verbose option and others a -q or --quiet option.

[chriscool]

See also: issue #304