patch 8.1.2243: typos in comments

Problem:    Typos in comments.
Solution:   Fix the typos. (Dominique Pelle, closes #5160)  Also adjust
            formatting a bit.
diff --git a/src/spellsuggest.c b/src/spellsuggest.c
index a5f8b92..9d6df79 100644
--- a/src/spellsuggest.c
+++ b/src/spellsuggest.c
@@ -990,7 +990,7 @@
     {
 	if (sps_flags & SPS_BEST)
 	    // Adjust the word score for the suggestions found so far for how
-	    // they sounds like.
+	    // they sound like.
 	    rescore_suggestions(su);
 
 	// While going through the soundfold tree "su_maxscore" is the score