[Rd] ctrl-R in Rgui

[Gabor Grothendieck]

When in the Rgui editor sometimes ctrl-R does not cause anything to be
sent to the R console.

It can be reproduced like this:

- when in the Rgui console press ctrl-F N to get a new editor window
- enter: pi + 3 followed by Enter
- while still in the editor window press ctrl-A ctrl-R and pi + 3 gets
entered into the console and runs as expected
- while still in the editor window press ctrl-A ctrl-R again

In the last case nothing happens whereas one would have expected it to
be entered into the console again and run again.

I am using [1] "R version 3.3.0 Patched (2016-05-03 r70575)"



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