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/normal.c b/src/normal.c
index 96f83d3..1baf68a 100644
--- a/src/normal.c
+++ b/src/normal.c
@@ -2644,7 +2644,7 @@
     long	old_fdl = curwin->w_p_fdl;
     int		old_fen = curwin->w_p_fen;
 #endif
-    long        siso = get_sidescrolloff_value();
+    long	siso = get_sidescrolloff_value();
 
     if (VIM_ISDIGIT(nchar) && !nv_z_get_count(cap, &nchar))
 	    return;
@@ -6307,7 +6307,7 @@
 	    // the unnamed register is 0
 	    reg = 0;
 
-        VIsual_select_reg = valid_yank_reg(reg, TRUE) ? reg : 0;
+	VIsual_select_reg = valid_yank_reg(reg, TRUE) ? reg : 0;
 	return;
     }