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/macros.h b/src/macros.h
index 53733c7..aa61d90 100644
--- a/src/macros.h
+++ b/src/macros.h
@@ -147,7 +147,7 @@
 				// see mch_open() comment
 # define mch_fopen(n, p)	fopen(vms_fixfilename(n), (p))
 # define mch_fstat(n, p)	fstat((n), (p))
-# undef HAVE_LSTAT	        // VMS does not have lstat()
+# undef HAVE_LSTAT		// VMS does not have lstat()
 # define mch_stat(n, p)		stat(vms_fixfilename(n), (p))
 #else
 # ifndef MSWIN
@@ -208,7 +208,7 @@
 #define REPLACE_NORMAL(s) (((s) & REPLACE_FLAG) && !((s) & VREPLACE_FLAG))
 
 #ifdef FEAT_ARABIC
-# define ARABIC_CHAR(ch)            (((ch) & 0xFF00) == 0x0600)
+# define ARABIC_CHAR(ch)	    (((ch) & 0xFF00) == 0x0600)
 # define UTF_COMPOSINGLIKE(p1, p2)  utf_composinglike((p1), (p2))
 #else
 # define UTF_COMPOSINGLIKE(p1, p2)  utf_iscomposing(utf_ptr2char(p2))