Motivation for this change

I was using home-manager to manage my tmux configuration when I noticed that the vim-tmux-navigator plugin didn't seem to work.

After some investigation, I found that the generated runtimepath for the vim-tmux-navigator plugin was broken:

$ nix repl
Welcome to Nix version 2.2.2. Type :? for help.

nix-repl> :l <nixpkgs>
Added 10237 variables.

nix-repl> pkgs.tmuxPlugins.vim-tmux-navigator.rtp
"/nix/store/kad7bgna5f6halc84xc793y9c8602iy2-tmuxplugin-vim-tmux-navigator/share/tmux-plugins/vim-tmux-navigator/vim_tmux_navigator.tmux"

This file doesn't exist, but /nix/store/kad7bgna5f6halc84xc793y9c8602iy2-tmuxplugin-vim-tmux-navigator/share/tmux-plugins/vim-tmux-navigator/vim-tmux-navigator.tmux does. I tracked down the culprit, which was a call to builtins.replaceStrings changing the - for _ and removed it; I have no idea why it's there. Perhaps @kalbasit can explain? I added a rtpFilePath for vim-tmux-navigator to fix this.

Things done

• Tested using sandboxing (nix.useSandbox on NixOS, or option sandbox in nix.conf on non-NixOS)
• Built on platform(s)
  • NixOS
  • macOS
  • other Linux distributions
• Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
• Tested compilation of all pkgs that depend on this change using nix-shell -p nix-review --run "nix-review wip"
• Tested execution of all binary files (usually in ./result/bin/)
• Determined the impact on package closure size (by running nix path-info -S before and after)
• Assured whether relevant documentation is up to date
• Fits CONTRIBUTING.md.