[TxMt] Column editing in R: difficulty entering "$"

[Peter Cowan]

When working on R source files I am unable to enter dollar signs in
column editing mode.  When I select a column and type $, only one is
entered in the first line and the column mode is left.  This happens
regardless of width of selection.

On my system I can replicate this by creating a new R file consisting of

foo_bar
foo_bar

selecting the column with the underscore and typing $

which yields:

foo$bar
foobar

with the caret after the $.

Oddly this doesn't occur if I type another character before typing the
dollar sign.

TIA

Peter