small changes around neovim and customscripts

overlays/customscripts/src/up

@@ -1,6 +1,6 @@
 #!/usr/bin/env nix-shell
 #! nix-shell -i bash -p curl
-for x in $@; do
+for x in "$@"; do
   curl -F "file=@\"$x\"" --header "key: $FILEHOST_KEY" https://f.weirdnatto.in
   echo " "
 done

overlays/customscripts/src/x0

@@ -1,6 +1,6 @@
 #!/usr/bin/env nix-shell
 #! nix-shell -i bash -p curl
-for x in $@; do
+for x in "$@"; do
   curl -F "file=@\"$x\"" https://x0.at/
   echo " "
 done