From 58e99aa5aa7ed59b0070309af1d732155aa0680c Mon Sep 17 00:00:00 2001
From: Joshua Peek <josh@joshpeek.com>
Date: Tue, 28 Jun 2011 09:26:35 -0500
Subject: [PATCH] Test blank file

---
 lib/linguist/blob_helper.rb | 2 +-
 test/fixtures/blank         | 0
 test/test_blob.rb           | 1 +
 3 files changed, 2 insertions(+), 1 deletion(-)
 create mode 100644 test/fixtures/blank

diff --git a/lib/linguist/blob_helper.rb b/lib/linguist/blob_helper.rb
index 321653f4..844ac03a 100644
--- a/lib/linguist/blob_helper.rb
+++ b/lib/linguist/blob_helper.rb
@@ -308,7 +308,7 @@ module Linguist
       # Fail fast if blob isn't viewable?
       return unless viewable?
 
-      if data && (match = lines[0].match(/(.+)\n?/)) && (bang = match[0]) =~ /^#!/
+      if lines.any? && (match = lines[0].match(/(.+)\n?/)) && (bang = match[0]) =~ /^#!/
         bang.sub!(/^#! /, '#!')
         tokens = bang.split(' ')
         pieces = tokens.first.split('/')
diff --git a/test/fixtures/blank b/test/fixtures/blank
new file mode 100644
index 00000000..e69de29b
diff --git a/test/test_blob.rb b/test/test_blob.rb
index 642306bb..62844590 100644
--- a/test/test_blob.rb
+++ b/test/test_blob.rb
@@ -240,6 +240,7 @@ class TestBlob < Test::Unit::TestCase
     assert_equal Language['VimL'],  blob(".vimrc").language
     assert_equal Language['YAML'],  blob(".gemrc").language
 
+    assert_nil blob("blank").language
     assert_nil blob("README").language
 
     # https://github.com/xquery/xprocxq/blob/master/src/xquery/xproc.xqm