patch 9.0.0828: various typos

Problem:    Various typos.
Solution:   Correct typos. (closes #11432)
diff --git a/src/spell.c b/src/spell.c
index 3196ae7..508c3ba 100644
--- a/src/spell.c
+++ b/src/spell.c
@@ -111,7 +111,7 @@
     win_T	*mi_win;		// buffer being checked
 
     // for NOBREAK
-    int		mi_result2;		// "mi_resul" without following word
+    int		mi_result2;		// "mi_result" without following word
     char_u	*mi_end2;		// "mi_end" without following word
 } matchinf_T;