treesitter(docs): update and refresh docs

runtime/lua/vim/treesitter/language.lua

@@ -2,6 +2,12 @@ local a = vim.api
 
 local M = {}
 
+--- Asserts that the provided language is installed, and optionnaly provide a path for the parser
+--
+-- Parsers are searched in the `parser` runtime directory.
+--
+-- @param lang The language the parser should parse
+-- @param path Optionnal path the parser is located at
 function M.require_language(lang, path)
   if vim._ts_has_language(lang) then
     return true
@@ -11,13 +17,18 @@ function M.require_language(lang, path)
     local paths = a.nvim_get_runtime_file(fname, false)
     if #paths == 0 then
       -- TODO(bfredl): help tag?
-      error("no parser for '"..lang.."' language")
+      error("no parser for '"..lang.."' language, see :help treesitter-parsers")
     end
     path = paths[1]
   end
   vim._ts_add_language(path, lang)
 end
 
+--- Inspects the provided language.
+--
+-- Inspecting provides some useful informations on the language like node names, ...
+--
+-- @param lang The language.
 function M.inspect_language(lang)
   M.require_language(lang)
   return vim._ts_inspect_language(lang)