Fix send code for newlines on Windows #114

[andycraig]

Fixes #114

What problem did you solve?

Currently, blank lines that end in '\r\n' (common on Windows) are treated as not being blank, and are sent to the console by R: Run Selection/Line. This PR treats '\r' as whitespace, and so these lines are not sent to the console.

How can I check this pull request (on any OS)?

Create a file temp.R containing:

# Some blank lines


x <- 1

If 'LR' is displayed at the bottom right of the VSCode window, click on it and change the end of line sequence to 'CRLF'.

Use R: Run Selection/Line. Only x <- 1 is sent to the console.

[Ikuyadeu]

@andycraig Thank you for your work!
I checked this.

[andycraig]

@Ikuyadeu Thank you!