some tabs to spaces

cd src
    grep -P -n '\t' *.c | grep -v "1:"
    cd ../include
    grep -P -n '\t' *.h | grep -v "1:"
    cd ..

side note: win/Qt/*.cpp are full of tabs

win/X11/wintext.c

@@ -1,11 +1,11 @@
 /* NetHack 3.7	wintext.c	$NHDT-Date: 1597967808 2020/08/20 23:56:48 $  $NHDT-Branch: NetHack-3.7 $:$NHDT-Revision: 1.22 $ */
-/* Copyright (c) Dean Luick, 1992				  */
+/* Copyright (c) Dean Luick, 1992                                 */
 /* NetHack may be freely redistributed.  See license for details. */
 
 /*
  * File for dealing with text windows.
  *
- *	+ No global functions.
+ *      + No global functions.
  */
 
 #ifndef SYSV
@@ -194,7 +194,7 @@ display_text_window(struct xwindow *wp, boolean blocking)
 
     if (width > (Dimension) XtScreen(wp->w)->width) { /* too wide for screen */
         /* Back off some amount - we really need to back off the scrollbar */
-        /* width plus some extra.					   */
+        /* width plus some extra.                                          */
         width = XtScreen(wp->w)->width - 20;
     }
     XtSetArg(args[num_args], XtNstring, text_info->text.text);