From 7a085393839c909275f817bdf0b99d312ff3f459 Mon Sep 17 00:00:00 2001
From: Brendan Cully <brendan@kublai.com>
Date: Sun, 28 Jun 2009 20:49:20 -0700
Subject: [PATCH] Allow tabs in index subject. Closes #3270.

---
 configure.ac | 2 +-
 curs_lib.c   | 6 +++++-
 2 files changed, 6 insertions(+), 2 deletions(-)

diff --git a/configure.ac b/configure.ac
index 9ba692f33..ce8a24107 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1215,7 +1215,7 @@ if test "$mutt_cv_wint_t" = no; then
 fi
 
 AC_CHECK_HEADERS(wctype.h)
-AC_CHECK_FUNCS(iswalnum iswalpha  iswcntrl iswdigit)
+AC_CHECK_FUNCS(iswalnum iswalpha iswblank iswcntrl iswdigit)
 AC_CHECK_FUNCS(iswgraph iswlower iswprint iswpunct iswspace iswupper)
 AC_CHECK_FUNCS(iswxdigit towupper towlower)
 
diff --git a/curs_lib.c b/curs_lib.c
index eaf26bc25..0308086c6 100644
--- a/curs_lib.c
+++ b/curs_lib.c
@@ -725,7 +725,11 @@ void mutt_format_string (char *dest, size_t destlen,
       w = 1; /* hack */
     else
     {
-      if (!IsWPrint (wc))
+      if (!IsWPrint (wc)
+#ifdef HAVE_ISWBLANK
+	  && !iswblank (wc)
+#endif
+      )
 	wc = '?';
       w = wcwidth (wc);
     }
-- 
2.40.0