. map does not recognize | as tree leaf if g:netrw_liststyle=3

[Konfekt]

Then, for example, hitting . on the file

rabbit\turtle.vim,

visualized by netrw as

rabbit | turtle.vim

would insert

rabbit| turtle.

[tpope]

Tree style is kind of quirky so I don't officially support it, but I'll accept a patch. Stripping off the | is pretty easy, but constructing the full path will be a bit trickier.