; Further minor simplification of rx form in bytecomp.el

* lisp/emacs-lisp/bytecomp.el (byte-compile--wide-docstring-p):
Simplify even more.  Thanks to Mattias Engdegård <mattiase@acm.org>.

lisp/emacs-lisp/bytecomp.el

@@ -1672,12 +1672,12 @@ URLs."
     ;; known at compile time.  So instead, we assume that these
     ;; substitutions are of some length N.
     (replace-regexp-in-string
-     (rx "\\" (seq "[" (* (not "]")) "]"))
+     (rx "\\[" (* (not "]")) "]")
      (make-string byte-compile--wide-docstring-substitution-len ?x)
      ;; For literal key sequence substitutions (e.g. "\\`C-h'"), just
      ;; remove the markup as `substitute-command-keys' would.
      (replace-regexp-in-string
-      (rx "\\" (seq "`" (group (* (not "'"))) "'"))
+      (rx "\\`" (group (* (not "'"))) "'")
       "\\1"
       docstring)))))