Use c+r instead of ctrl+r.
In order to avoid confusion, I am striking out the incorrect edit that someone else made, rather than reverting it. In the context of a vim mapping (such as the :nnoremap
of this question) the following should be typed literally. For example, <c-r>
really means 5 characters.
Use <c-r>
instead of <ctrl+r>
.
See :help keycodes
for more options.