Three closing parenthesis, ))), are evaluated even though no open equivalence exists

Please, consider these two lines:

**
xp=c(leftE(yr),rev(rightE(yr)))
yp=c(yr,rev(yr))
**

They are renderized as...

**
xp=c(leftE(yr),rev(rightE(yr

yp=c(yr,rev(yr))
**

I get the same output when using ?xpage=plain&outputSyntax=plain

Please, could you figure out any way of avoiding this? Thanks!

I've used the playground to make some experiments with this ))) chain. Working with 2.0 M1 there, they are renderized as a return and once you save changes you lost them. I mean, next time you edit the document, you will get a return instead of the ))) chain. This doesn't happen with 2.0 M2: they are renderized as a return, but is you save the document and edit it again, the three open parentheses are still there.