bug#60526: 29.0.60; javascript-mode → js-mode

[Juri Linkov]

It looks wrong to require from users to add mappings for both `js-mode'
and its alias `javascript-mode' to `major-mode-remap-alist':

  (add-to-list 'major-mode-remap-alist '(js-mode . js-ts-mode))
  (add-to-list 'major-mode-remap-alist '(javascript-mode . js-ts-mode))

Either `major-mode-remap-alist' could support aliases, or simpler
would be just to replace the alias in `auto-mode-alist':

diff --git a/lisp/files.el b/lisp/files.el
index c45c3d40a5d..2acc1d1df4a 100644
--- a/lisp/files.el
+++ b/lisp/files.el
@@ -2952,9 +2952,9 @@ auto-mode-alist
      ("\\.dbk\\'" . xml-mode)
      ("\\.dtd\\'" . sgml-mode)
      ("\\.ds\\(ss\\)?l\\'" . dsssl-mode)
-     ("\\.js[mx]?\\'" . javascript-mode)
+     ("\\.js[mx]?\\'" . js-mode)
      ;; https://en.wikipedia.org/wiki/.har
-     ("\\.har\\'" . javascript-mode)
+     ("\\.har\\'" . js-mode)
      ("\\.json\\'" . js-json-mode)
      ("\\.[ds]?va?h?\\'" . verilog-mode)
      ("\\.by\\'" . bovine-grammar-mode)