master updated (51f8e86374 -> 616da8fa8e)

[Gregory Heytings]

ghe pushed a change to branch master.

      from  51f8e86374 Update buffer's chars-modified tick when inserting from 
gap
      adds  38b3780f6e Actually fix the long lines display bug (bug#56393).
      adds  eb6d2fb58d Various improvements to auto-narrow mode.
      adds  051d2a1e36 Improve isearch in auto-narrow-mode.
      adds  7b19ce51fc Fix improvement of isearch in auto-narrow-mode.
      adds  c0c4600ece Fix calculation of the vertical scroll bar's thumb
      adds  9ea9533f17 * src/xdisp.c (set_vertical_scroll_bar): Remove stale 
comment.
      adds  e31cffb5ab Revert commits 9ea9533f17, c0c4600ece, 7b19ce51fc, 
051d2a1e36 and eb6d2fb58d.
      adds  60e51595c8 Revert commit 38b3780f6e.
      adds  1792cbaddc Actually fix the long lines display bug (bug#56393).
      adds  afbac35bba Fix typo in 1792cbaddc.
      adds  a740608453 Fix segfault in composite.c
      adds  9de00e5fda Avoid assertion violations in 
'back_to_previous_visible_line_start'
      adds  e7b5912b23 Improvements to long lines handling.
      adds  66704fbbcf Fix typo in e7b5912b23.
      adds  cc7f37b2a4 Further improvements to long lines handling.
      adds  fea2eedf96 Fix typo in NEWS title.
      adds  6a097a8621 Shorter and safer fix for the segfault.
      adds  1ff69cc744 Improve the heuristic for long lines detection.
      adds  c760d2ed16 * etc/PROBLEMS: Remove the entry which is no longer 
relevant.
      adds  0699f80f85 Fix calculation of the vertical scroll bar's thumb
      adds  7dcea5a428 * src/xdisp.c (set_vertical_scroll_bar): Remove stale 
comment.
      adds  9a894206f6 Improve the heuristic for long lines detection again.
      adds  c6bee17075 Revert commits 1ff69cc744 and 9a894206f6.
      adds  7c0fc85364 Simplified and improved heuristic for long lines 
detection.
      adds  c7eef61eee Further tweaks to long lines handling.
      adds  e09c056a44 * src/xdisp.c (redisplay_window): Small optimization.
       new  616da8fa8e Merge branch 'feature/fix-the-long-lines-display-bug'


Summary of changes:
 doc/emacs/emacs.texi             |   1 -
 doc/emacs/trouble.texi           |  59 ----------------------
 etc/NEWS                         |  24 +++++----
 etc/PROBLEMS                     |   6 ---
 lisp/{ => obsolete}/longlines.el |   1 +
 src/buffer.c                     |  26 +++++++---
 src/buffer.h                     |  11 +++--
 src/composite.c                  |   6 +++
 src/dispextern.h                 |   5 ++
 src/insdel.c                     |  18 +++----
 src/lisp.h                       |  14 ++++--
 src/search.c                     |   2 +-
 src/textprop.c                   |   2 +-
 src/window.c                     |   2 +-
 src/window.h                     |   1 +
 src/xdisp.c                      | 103 +++++++++++++++++++++++++++++++++++----
 16 files changed, 168 insertions(+), 113 deletions(-)
 rename lisp/{ => obsolete}/longlines.el (99%)