Spelling and wording fixes.

doc/lispref/display.texi

@@ -3931,7 +3931,7 @@ the appearance of dividers:
 @item window-divider
 When a divider is less than three pixels wide, it is drawn solidly with
 the foreground of this face.  For larger dividers this face is used for
-the inner part only, exluding the first and last pixel.
+the inner part only, excluding the first and last pixel.
 
 @item window-divider-first-pixel
 This is the face used for drawing the first pixel of a divider that is

etc/NEWS

@@ -198,7 +198,7 @@ content-type that is found in the new variable `image-format-suffixes'.
 
 +++
 *** The function `window-in-direction' introduced in Emacs 24.1 now
-takes additional arguments for specifiying a reference point, wrapping
+takes additional arguments for specifying a reference point, wrapping
 selection around frame borders, and specifying ways to select the
 minibuffer window.
 
@@ -792,7 +792,7 @@ Use `electric-indent-mode' instead.
 to filter the list of packages by a keyword.
 
 +++
-*** In the `describe-package' buffer, there are now buttons listing the 
+*** In the `describe-package' buffer, there are now buttons listing the
 keywords related to the package.  Click on a button to see other packages
 related to that keyword.
 

lisp/window.el

@@ -6825,11 +6825,10 @@ frames can be resized in both dimensions."
 
 (defcustom fit-frame-to-buffer-margins '(nil nil nil nil)
   "Margins around frame for `fit-frame-to-buffer'.
-This option allows to specify the numbers of pixels to be left
-free on the left, above, the right, and below a frame that shall
-be fit to its buffer.  Set these to avoid that such a frame
-obscurs other desktop objects like the taskbar.  The default is
-nil for each side which means to not add any margins.
+This specifies the numbers of pixels to be left free on the left,
+above, on the right, and below a frame fitted to its buffer.  Set
+this to avoid obscuring other desktop objects like the taskbar.
+The default is nil for each side, which means to not add margins.
 
 The value specified here can be overridden for a specific frame
 by that frame's `fit-frame-to-buffer-margins' parameter, if