* lib/rdoc/*, test/rdoc/*: Update rdoc-5.0.0

  Release note: https://github.com/rdoc/rdoc/blob/b825775647f62c5b525e9780a28ff2fbb1d5bf6f/History.rdoc#500--2016-11-05

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@56586 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 7 insertions, 18 deletions

diff --git a/lib/rdoc/parser.rb b/lib/rdoc/parser.rb
index 9c207edcff..5abc374bf7 100644
--- a/lib/rdoc/parser.rb
+++ b/lib/rdoc/parser.rb
@@ -76,25 +76,15 @@ class RDoc::Parser
 
     s = File.read(file, 1024) or return false
 
-    have_encoding = s.respond_to? :encoding
-
     return true if s[0, 2] == Marshal.dump('')[0, 2] or s.index("\x00")
 
-    if have_encoding then
-      mode = "r"
-      s.sub!(/\A#!.*\n/, '')     # assume shebang line isn't longer than 1024.
-      encoding = s[/^\s*\#\s*(?:-\*-\s*)?(?:en)?coding:\s*([^\s;]+?)(?:-\*-|[\s;])/, 1]
-      mode = "rb:#{encoding}" if encoding
-      s = File.open(file, mode) {|f| f.gets(nil, 1024)}
-
-      not s.valid_encoding?
-    else
-      if 0.respond_to? :fdiv then
-        s.count("\x00-\x7F", "^ -~\t\r\n").fdiv(s.size) > 0.3
-      else # HACK 1.8.6
-        (s.count("\x00-\x7F", "^ -~\t\r\n").to_f / s.size) > 0.3
-      end
-    end
+    mode = "r"
+    s.sub!(/\A#!.*\n/, '')     # assume shebang line isn't longer than 1024.
+    encoding = s[/^\s*\#\s*(?:-\*-\s*)?(?:en)?coding:\s*([^\s;]+?)(?:-\*-|[\s;])/, 1]
+    mode = "rb:#{encoding}" if encoding
+    s = File.open(file, mode) {|f| f.gets(nil, 1024)}
+
+    not s.valid_encoding?
   end
 
   ##
@@ -308,4 +298,3 @@ require 'rdoc/parser/changelog'
 require 'rdoc/parser/markdown'
 require 'rdoc/parser/rd'
 require 'rdoc/parser/ruby'
-