Merge from origin/emacs-27

71fc0038 (origin/emacs-27) Avoid infloop in 'format-mode-line'
247dcb4b Clarify the documentation of 'left/right-fringe' display spec
d453cee1 Minor improvement in ELisp manual
3c778c44 * doc/misc/tramp.texi (Customizing Methods): Fix typo.
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Status Job ID Name Coverage
  Test
passed #6562
test-all

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