Fix bug #18584 with assertion violations while scrolling.

 src/xdisp.c (move_it_by_lines): Call reseat_1 after moving the
 iterator backwards, to resync the bidi iterator.
* configure.ac: Port to strict POSIX shells on non-MinGW.
* lisp/vc/vc-svn.el (vc-svn-after-dir-status): Fix the non-remote regexp,
similarly to Roger's 2010-06-12 change for the remote change.
* font.c (font_list_entities): Do not add empty vector to font cache.
(font_matching_entity): Likewise.  If matching entity is found, insert
1-item vector with this entity instead of an entity itself (Bug#17125).
Sync with Org 8.2.8.
Mention `frame-resize-pixelwise' to make frames truly fullscreen or maximized.

* frame.el (toggle-frame-maximized, toggle-frame-fullscreen):
In doc-string mention need of setting `frame-resize-pixelwise'.

* frames.texi (Frame Commands):
* cmdargs.texi (Window Size X): Mention the use of
`frame-resize-pixelwise' to make frames truly fullscreen or
maximized.

* frames.texi (Size Parameters, Size and Position): Mention that
with some window managers you have to set
`frame-resize-pixelwise' in order make a frame truly fullscreen
or maximized.
Fix vc-svn-ignore

* lisp/vc/vc-svn.el (vc-svn-ignore-completion-table): Implement.
(vc-svn-ignore): Use it.
A few tiny doc/ copyedits.
ChangeLog fixes
ChangeLog fix
ChangeLog fixes
doc/emacs copyedits re rectangle-mark-mode

* doc/emacs/killing.texi (Rectangles): Copyedits re rectangle-mark-mode.
(CUA Bindings): Mention rectangle-mark-mode.
Doc tweaks re multi-monitor

* doc/lispref/frames.texi (Multiple Terminals): Copyedits re multiple monitors.

* lisp/frame.el (frame-monitor-attributes, display-monitor-attributes-list):
Doc fixes.
* doc/lispref/windows.texi (Window Sizes, Resizing Windows): Copyedits.
Small doc/ fixes re @var usage.

* doc/emacs/cmdargs.texi (Misc X):
* doc/emacs/display.texi (Optional Mode Line):
* doc/emacs/misc.texi (emacsclient Options):
* doc/emacs/vc1-xtra.texi (VC Delete/Rename):
* doc/lispref/buffers.texi (Buffer List):
* doc/lispref/display.texi (Image Descriptors, Defining Images):
* doc/lispref/functions.texi (Core Advising Primitives):
Small fixes re @var usage.
Small copyedits for doc/lispref

* doc/lispref/display.texi (Scroll Bars):
* doc/lispref/modes.texi (Header Lines): Copyedits.
* doc/misc/vip.texi (Other Vi Commands): Markup fix.
* doc/lispref/commands.texi (Generic Commands): Copyedits.
doc/emacs small markup fixes

* doc/emacs/misc.texi (Sorting):
* doc/emacs/search.texi (Query Replace): Markup fixes.
* imenu.el (imenu-default-goto-function): Fix typo.