patch 8.2.2160: various typos

Problem:    Various typos.
Solution:   Fix spelling mistakes. (closes #7494)
diff --git a/src/search.c b/src/search.c
index cc7b5a9..f95bf3c 100644
--- a/src/search.c
+++ b/src/search.c
@@ -3753,7 +3753,7 @@
 
 		    // we read a line, set "already" to check this "line" later
 		    // if depth >= 0 we'll increase files[depth].lnum far
-		    // bellow  -- Acevedo
+		    // below  -- Acevedo
 		    already = aux = p = skipwhite(line);
 		    p = find_word_start(p);
 		    p = find_word_end(p);