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/ex_cmds.c b/src/ex_cmds.c
index 880bf5a..7e730be 100644
--- a/src/ex_cmds.c
+++ b/src/ex_cmds.c
@@ -2511,7 +2511,7 @@
 #endif
     int		readfile_flags = 0;
     int		did_inc_redrawing_disabled = FALSE;
-    long        *so_ptr = curwin->w_p_so >= 0 ? &curwin->w_p_so : &p_so;
+    long	*so_ptr = curwin->w_p_so >= 0 ? &curwin->w_p_so : &p_so;
 
 #ifdef FEAT_PROP_POPUP
     if (ERROR_IF_TERM_POPUP_WINDOW)