patch 9.1.0105: Style: typos found

Problem:  Style: typos found
Solution: correct them
          (zeertzjq)

closes: #14023

Signed-off-by: zeertzjq <zeertzjq@outlook.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/src/regexp.c b/src/regexp.c
index 7355201..4373ae0 100644
--- a/src/regexp.c
+++ b/src/regexp.c
@@ -1318,8 +1318,7 @@
 	    top = curbuf->b_visual.vi_end;
 	    bot = curbuf->b_visual.vi_start;
 	}
-	// a substitue command may have
-	// removed some lines
+	// a substitute command may have removed some lines
 	if (bot.lnum > curbuf->b_ml.ml_line_count)
 	    bot.lnum = curbuf->b_ml.ml_line_count;
 	mode = curbuf->b_visual.vi_mode;