bug#24855: 26.0.50; Buffer-menu-no-header fails if fake header starts with white space

[Tino Calancha <tino.calancha@gmail.com>]

emacs -r -Q -eval "(setq Buffer-menu-use-header-line nil)"
C-x C-b C-x o
M-: (Buffer-menu-no-header) RET
=> t


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From 7385a0952923cc3ec435fe9097cd5c81da4c59eb Mon Sep 17 00:00:00 2001
From: Tino Calancha <tino.calancha@gmail.com>
Date: Wed, 2 Nov 2016 14:14:58 +0900
Subject: [PATCH] Buffer-menu-no-header: Detect a fake header

* lisp/buff-menu.el (Buffer-menu-no-header): Match fake
headers starting with a white space (Bug#24855).
---
  lisp/buff-menu.el | 2 +-
  1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/lisp/buff-menu.el b/lisp/buff-menu.el
index 4742628..41bcfab 100644
--- a/lisp/buff-menu.el
+++ b/lisp/buff-menu.el
@@ -328,7 +328,7 @@ Buffer-menu-buffer
  (defun Buffer-menu-no-header ()
    (beginning-of-line)
    (if (or Buffer-menu-use-header-line
-	  (not (eq (char-after) ?C)))
+	  (not (looking-at-p "^ ?C")))
        t
      (ding)
      (forward-line 1)
-- 
2.10.1

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In GNU Emacs 26.0.50.2 (x86_64-pc-linux-gnu, GTK+ Version 3.22.2)
  of 2016-11-02 built on calancha-pc
Repository revision: c3640fcc96ed80368209c73d7ac9a0f0d1833d93