style: fix spelling in code comments and strings

graphics/nxbe/nxbe_move.c

@@ -345,7 +345,7 @@ static inline void nxbe_move_pwfb(FAR struct nxbe_window_s *wnd,
 
   /* Construct the destination bounding box in relative window
    * coordinates.  This derives from the source bounding box with
-   * an offset distination.
+   * an offset destination.
    */
 
   nxgl_rectoffset(&destrect, &srcrect, offset->x, offset->y);

graphics/nxbe/nxbe_setsize.c

@@ -284,7 +284,7 @@ void nxbe_setsize(FAR struct nxbe_window_s *wnd,
   nxgl_rectunion(&bounds, &bounds, &wnd->bounds);
 
   /* Then redraw this window AND all windows below it. Having resized the
-   * window, we may have exposed previoulsy obscured portions of windows
+   * window, we may have exposed previously obscured portions of windows
    * below this one.
    */
 

graphics/nxterm/nxterm_driver.c

@@ -233,7 +233,7 @@ static ssize_t nxterm_write(FAR struct file *filep, FAR const char *buffer,
 
       do
         {
-          /* Is the character part of a VT100 escape sequnce? */
+          /* Is the character part of a VT100 escape sequence? */
 
           state = nxterm_vt100(priv, ch);
           switch (state)
@@ -312,7 +312,7 @@ static int nxterm_ioctl(FAR struct file *filep, int cmd, unsigned long arg)
 {
   /* NOTE:  We don't need driver context here because the NXTERM handle
    * provided within each of the NXTERM IOCTL command data.  Mutual
-   * exclusion is similar managed by the IOCTL cmmand handler.
+   * exclusion is similar managed by the IOCTL command handler.
    *
    * This permits the IOCTL to be called in abnormal context (such as
    * from boardctl())
@@ -378,7 +378,7 @@ static int nxterm_unlink(FAR struct inode *inode)
  *
  * NOTE:  We don't need driver context here because the NXTERM handle
  * provided within each of the NXTERM IOCTL command data.  Mutual
- * exclusion is similar managed by the IOCTL cmmand handler.
+ * exclusion is similar managed by the IOCTL command handler.
  *
  * This permits the IOCTL to be called in abnormal context (such as
  * from boardctl())

graphics/nxterm/nxterm_font.c

@@ -131,7 +131,7 @@ static void nxterm_fillspace(FAR struct nxterm_state_s *priv,
  *
  * Description:
  *   This is part of the nxterm_putc logic.  It creates and positions a
- *   the character and renders (or re-uses) a glyph for font.
+ *   the character and renders (or reuses) a glyph for font.
  *
  ****************************************************************************/