patch 8.2.4928: various white space and cosmetic mistakes

Problem:    Various white space and cosmetic mistakes.
Solution:   Change spaces to tabs, improve comments.
diff --git a/src/window.c b/src/window.c
index b4f8c1d..fca0eea 100644
--- a/src/window.c
+++ b/src/window.c
@@ -6371,8 +6371,8 @@
     // - window height is sufficient to display the whole buffer and first line
     //   is visible.
     if (height > 0
-        && (!wp->w_p_scb || wp == curwin)
-        && (height < wp->w_buffer->b_ml.ml_line_count || wp->w_topline > 1))
+	   && (!wp->w_p_scb || wp == curwin)
+	   && (height < wp->w_buffer->b_ml.ml_line_count || wp->w_topline > 1))
     {
 	/*
 	 * Find a value for w_topline that shows the cursor at the same