Small changes

nvim/ftdetect/paret.vim

@@ -0,0 +1 @@
+au BufRead,BufNewFile *.paret set filetype=paret

nvim/init.vim

@@ -20,7 +20,7 @@ set undodir=~/.vim/undo
 set list lcs=tab:\|-
 set tabstop=4
 set softtabstop=4
-set noexpandtab
+set expandtab
 set shiftwidth=4
 set smarttab
 

nvim/syntax/paret.vim

@@ -0,0 +1,37 @@
+" Vim syntax file
+" Language: Paret
+" Maintainer: Kalle Struik
+" Latest Revision: 17 March 2022
+
+if exists("b:current_syntax")
+  finish
+endif
+
+" Binary builtins
+syn keyword paretBinaryBuiltins '+' '*' '-' and or num= num< num> cons
+" Unary builtins
+syn keyword paretBinaryBuiltins not head tail is-nil is-list
+" Variable size builtins
+syn keyword paretVariableBuiltins list 
+" Misc builtins
+syn keyword paretMiscBuiltins if lambda let letrec
+
+
+" Number constants
+syn match paretNumber '\d\+'
+" Boolean constants
+syn keyword paretBoolean true false
+" Nil constants
+syn keyword paretNil nil
+
+
+let b:current_syntax = "paret"
+
+hi def link paretBinaryBuiltins     Statement
+hi def link paretUnaryBuiltins      Statement
+hi def link paretVariableBuiltins   Statement
+hi def link paretMiscBuiltins       Statement
+
+hi def link paretNumber             Constant
+hi def link paretBoolean            Constant
+hi def link paretNil                Constant

setup.sh

@@ -1,4 +1,4 @@
-#!/bin/env bash
+#!/usr/bin/env bash
 cd $(dirname $0)
 
 DOTS_DIR=$(pwd)