Merge from origin/emacs-26

2670cbf (origin/emacs-26) ; * configure.ac: Remove outdated comment (...
3b71bef admin.el: respect environment settings for makeinfo etc
3764ab4 * etc/PROBLEMS: New entry about GTK+ 3 crash with some X serv...
9d61344 Index profiler commands in elisp manual
f088817 Fix math-imaginary-i check
fca935e ; Let pre-commit git hook check merged in changes (Bug#29197)
fe06fcc Avoid infinite hscrolling loops when line numbers are displayed
63e59c8 Avoid crashes in malformed defvar
785682c * configure.ac (emacs_config_features): Add GLIB, XDBE, XIM.
2695b7e * configure.ac: Doc fixes related to --with-xim.
d0d162c Small checkdoc quoting fix (bug#32546)

Conflicts:
	configure.ac

diff --cc configure.ac
index 31750ef66a75fd81a922f4039d8e3cbf2c082d00,029f451cd4a1515389a2889061fe58ab2f3e4b00..85ac932688c51c1c56110dd5baf144f8cf58fa9d
--- 1/configure.ac
--- 2/configure.ac
+++ b/configure.ac
@@@ -5429,9 -5366,9 +5429,9 @@@ Configured for '${canonical}'
  optsep=
  emacs_config_features=
  for opt in XAW3D XPM JPEG TIFF GIF PNG RSVG CAIRO IMAGEMAGICK SOUND GPM DBUS \
-   GCONF GSETTINGS NOTIFY ACL LIBSELINUX GNUTLS LIBXML2 FREETYPE M17N_FLT \
-   LIBOTF XFT ZLIB TOOLKIT_SCROLL_BARS X_TOOLKIT OLDXMENU X11 NS MODULES \
-   THREADS XWIDGETS LIBSYSTEMD JSON CANNOT_DUMP LCMS2 GMP; do
+   GCONF GSETTINGS GLIB NOTIFY ACL LIBSELINUX GNUTLS LIBXML2 FREETYPE M17N_FLT \
+   LIBOTF XFT ZLIB TOOLKIT_SCROLL_BARS X_TOOLKIT OLDXMENU X11 XDBE XIM \
 -  NS MODULES THREADS XWIDGETS LIBSYSTEMD CANNOT_DUMP LCMS2; do
++  NS MODULES THREADS XWIDGETS LIBSYSTEMD JSON CANNOT_DUMP LCMS2 GMP; do
  
      case $opt in
        CANNOT_DUMP) eval val=\${$opt} ;;

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

diff --cc etc/PROBLEMS
Simple merge

diff --cc lisp/emacs-lisp/checkdoc.el
Simple merge

diff --cc src/eval.c
Simple merge

diff --cc src/xdisp.c
Simple merge