patch 9.0.0828: various typos

Problem:    Various typos.
Solution:   Correct typos. (closes #11432)
diff --git a/src/gui_w32.c b/src/gui_w32.c
index 2dc54bf..8424c6c 100644
--- a/src/gui_w32.c
+++ b/src/gui_w32.c
@@ -1973,7 +1973,7 @@
 	if (dead_key != DEAD_KEY_OFF)
 	{
 	    /*
-	     * Expell the dead key pressed with Ctrl in a special way.
+	     * Expel the dead key pressed with Ctrl in a special way.
 	     *
 	     * After dead key was pressed with Ctrl in some cases, ESC was
 	     * artificially injected and handled by _OnChar(), now we are
@@ -2160,7 +2160,7 @@
 		   )
 		{
 		    // post WM_CHAR='[' - which will be interpreted with CTRL
-		    // stil hold as ESC
+		    // still hold as ESC
 		    PostMessageW(msg.hwnd, WM_CHAR, '[', msg.lParam);
 		    // ask _OnChar() to not touch this state, wait for next key
 		    // press and maintain knowledge that we are "poisoned" with