Move Vim-Plug Neovim Setup TIL to Neovim Section

neovim/set-up-vim-plug-with-neovim.md

@@ -0,0 +1,25 @@
+# Set Up Vim-Plug With Neovim
+
+To get [vim-plug](https://github.com/junegunn/vim-plug) working with Neovim, it
+needs to be installed in a known autoload directory.
+
+The help files say that "plugins installed by user" should be located in the
+data home directory at `stdpath("data")` under `site`. For me (on OSX) the data
+home directory is `~/.local/share/nvim`, so `~/.local/share/nvim/site`.
+
+Under this site directory, along with any directories on the `runtimepath`,
+Neovim looks for various runtime files and subdirectories. This includes the
+`/autoload` directory. That's where you want to install `vim-plug`.
+
+```bash
+sh -c 'curl -fLo "${XDG_DATA_HOME:-$HOME/.local/share}"/nvim/site/autoload/plug.vim --create-dirs \
+       https://raw.githubusercontent.com/junegunn/vim-plug/master/plug.vim'
+```
+
+This shell statement uses [the `:-` parameter
+expansion](../unix/provide-a-fallback-value-for-unset-parameter.md) to specify a
+path using either the `XDG_DATA_HOME` or `$HOME` as a fallback. This ends up
+resolving to `~/.local/share`, so the `plug.vim` file is placed in
+`~/.local/share/nvim/site/autload/`.
+
+See `:h runtimepath` for more details.