REPL .load multiline arrow function expressions

[rsxdalv]

• Version: v7.10.0
• Platform: Linux DC-28 4.4.0-43-Microsoft deps: update openssl to 1.0.1j #1-Microsoft Wed Dec 31 14:42:53 PST 2014 x86_64 x86_64 x86_64 GNU/Linux

There is no documented way of doing a .load in .editor style, causing multiline expressions (and JavaScript's implicit semicolons within a REPL) to break functions such as this:

const parseXlsx = (file) =>
    getFile(file)
        .then(data => xlsx.read(data))

(After getFile(file), the single line REPL will assume that the expression is done)

Proposal:
Combine .editor and .load into .load-editor or .load-multiline that loads the entire file before executing it. Possible workarounds - requiring the file and using exports, but that's reinventing .load. Alternatively, I'll attempt to minify the output, as that should reduce whitespace that has a special meaning in REPL single-line mode.