optional, and you must turn them on manually, or customize
'auto-mode-alist' to turn them on automatically.
+Where no major modes previously existed in Emacs for editing the kinds
+of files for which Emacs now provides a tree-sitter based mode, Emacs
+will now try to enable the tree-sitter mode automatically when you
+visit such files, and will display a warning if the tree-sitter
+library or the parser grammar library is not available. To prevent
+the warnings, either build Emacs with tree-sitter and install the
+grammar libraries, or customize 'auto-mode-alist' to specify some
+other major mode (or even Fundamental mode) for those kinds of files.
+
Each major mode based on tree-sitter needs a language grammar library,
usually named "libtree-sitter-LANG.so" ("libtree-sitter-LANG.dll" on
MS-Windows), where LANG is the corresponding language name. Emacs