Calling echo with zero arguments prints undefined

[BenHormann-Intergen]

Expected behavior

term.echo(); should result in output of one blank line.

Actual behavior

term.echo(); outputs a line with 'undefined'.

Steps to reproduce

https://jsfiddle.net/pjn54s6f/1/embedded/js,result

Browser and OS

Any. (Open the jsfiddle result in IE to highlight my issue with using term.echo('');).

[jcubic]

I think that it should just do nothing or just throw exception, you're echo nothing, it's definitely users error that should be ignored or user should be notified. I don't think that echo() and echo('') should act the same.

[jcubic]

I've decided that this is correct behavior, now if you echo undefined or empty string you will have single blank like. But if empty string left after extended command got removed and executed it will be ignored.

[BenHormann-Intergen]

I forgot to say echo(undefined) should still print undefined. Probably?
You'd have to check the length of arguments to differentiate the two.

[jcubic]

Updated the code it now prints undefined when using echo(undefined) as suggested I've used arguments.length

[BenHormann-Intergen]

Good job (and so quick!), thanks. Cool project, keep it up.

[jcubic]

In version 2.2.0