Merge from origin/emacs-28

Merge from origin/emacs-28

efb1cd7fa9 ; * etc/charsets/README: Update the format documentation.
cc796b7409 Tramp doc cleanup
a338d46060 Make emacs-lisp-byte-compile-and-load load the .elc file a...
3eac7dc780 Fix point movement in image-dired
4e9452a399 Improve shortdoc for vector
f223ac6ef9 Fix test bug when calloc returns null
ebeaa54f19 Pacify GCC 11 -fanalyzer on x86-64
56d1f42f30 Improve handling of non-character events in input methods
3fbe6fd367 ; Fix mistakes in last doc rewording about shorthands