Merge from origin/emacs-28

eb11dae499 Improve documentation of column-related functions
c95a34c960 * src/macfont.m (macfont_open): Initialize font->space_wid...
31a6a37d45 Improve indexing of keymap variables

diff --cc doc/lispref/display.texi
Simple merge

diff --cc doc/lispref/keymaps.texi
Simple merge

diff --cc doc/lispref/text.texi
Simple merge

diff --cc src/indent.c
Simple merge

diff --cc src/macfont.m
Simple merge