tweaks to vim paste and git

hosts/common.nix

@@ -72,6 +72,7 @@
     home-manager.useUserPackages = true;
 
     # Allow specified unfree packages (identified elsewhere)
+    # Retrieves package object based on string name
     nixpkgs.config.allowUnfreePredicate = pkg:
       builtins.elem (lib.getName pkg) config.unfreePackages;