Fix a few typos

* etc/NEWS: Fix a typo.

* src/xdisp.c (try_window_reusing_current_matrix, try_window_id):
* src/dispnew.c (scrolling_window): Fix typos in comments.

Author: Eli-Zaretskii

etc/NEWS

@@ -38,7 +38,7 @@ HarfBuzz text shaping engine.  It is on by default; use './configure
 --without-harfbuzz' to build without it.  The HarfBuzz text shaping is
 available via new font backend drivers 'xfthb' and 'ftcrhb' for Xft
 and Cairo drawings, respectively, and via the 'harfbuzz' backend on
-MS-Windows.  The Harfbuzz text shaping is preferred to the previously
+MS-Windows.  The HarfBuzz text shaping is preferred to the previously
 supported ones, so the font backends that use older shaping engines
 (FLT on GNU and Unix systems and Uniscribe on MS-Windows) are not
 enabled by default; they can be enabled via the 'font-backend' frame

src/dispnew.c

@@ -4361,7 +4361,7 @@ scrolling_window (struct window *w, int tab_line_p)
 
   /* Can't scroll the display of w32 GUI frames when position of point
      is indicated by the system caret, because scrolling the display
-     will then "copy" the pixles used by the caret.  */
+     will then "copy" the pixels used by the caret.  */
 #ifdef HAVE_NTGUI
   if (w32_use_visible_system_caret)
     return 0;

src/xdisp.c

@@ -19193,7 +19193,7 @@ try_window_reusing_current_matrix (struct window *w)
 
   /* Can't scroll the display of w32 GUI frames when position of point
      is indicated by the system caret, because scrolling the display
-     will then "copy" the pixles used by the caret.  */
+     will then "copy" the pixels used by the caret.  */
 #ifdef HAVE_NTGUI
   if (w32_use_visible_system_caret)
     return false;
@@ -20185,7 +20185,7 @@ try_window_id (struct window *w)
 
   /* Can't let scroll_run_hook below run on w32 GUI frames when
      position of point is indicated by the system caret, because
-     scrolling the display will then "copy" the pixles used by the
+     scrolling the display will then "copy" the pixels used by the
      caret.  */
 #ifdef HAVE_NTGUI
   if (FRAME_W32_P (f) && w32_use_visible_system_caret)