fix: don't use tree-sitter to get module name for mod snippet

CHANGELOG.md

@@ -14,6 +14,8 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   tree-sitter-haskell v0.21.0 rewrite.
   Because there are not many queries, this plugin maintains backward
   compatibility with the previous tree-sitter-haskell implementation for now.
+- Don't use tree-sitter to get the module name for the `mod` snippet,
+  as this is most likely not set. Instead, use `<filename>:t:r`.
 
 ## [1.4.3] - 2023-12-15
 

lua/haskell-snippets/module.lua

@@ -62,10 +62,7 @@ end
 
 ---@return string | nil
 local function get_buf_module_name(_)
-  local buf_content = table.concat(vim.api.nvim_buf_get_lines(0, 0, -1, false), '\n')
-  return treesitter_module_name(function(mod)
-    return mod
-  end, buf_content, '(haskell (header module: (module) @mod))', '(haskell module: (module) @mod)')
+  return vim.fn.fnamemodify(vim.api.nvim_buf_get_name(0), ':t:r')
 end
 
 local function get_module_name_node()