* encoding.c (get_default_external): add description.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@19450 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,7 @@
+Mon Sep 22 02:39:05 2008  NARUSE, Yui  <naruse@ruby-lang.org>
+
+	* encoding.c (get_default_external): add description.
+
 Sun Sep 21 21:52:41 2008  Tadayoshi Funaba  <tadf@dotrb.org>
 
 	* math.c (math_log): should check argc.
@@ -26,26 +30,26 @@ Sun Sep 21 10:19:04 2008  Tadayoshi Funaba  <tadf@dotrb.org>
 
 Sun Sep 21 09:37:57 2008  James Edward Gray II  <jeg2@ruby-lang.org>
 
-  * lib/csv/csv.rb:  Reworked CSV's parser and generator to be m17n.  Data
-    is now parsed in the Encoding it is in without need for translation.
-  * lib/csv/csv.rb:  Improved inspect() messages for better IRb support.
-  * lib/csv/csv.rb:  Fixed header writing bug reported by Dov Murik.
-  * lib/csv/csv.rb:  Use custom separators in parsing header Strings as
-    suggested by Shmulik Regev.
-  * lib/csv/csv.rb:  Added a :write_headers option for outputting headers.
-  * lib/csv/csv.rb:  Handle open() calls in binary mode whenever we can to
-    workaround a Windows issue where line-ending translation can cause an
-    off-by-one error in seeking back to a non-zero starting position after
-    auto-discovery for :row_sep as suggested by Robert Battle.
-  * lib/csv/csv.rb:  Improved the parser to fail faster when fed some forms
-    of invalid CSV that can be detected without reading ahead.
-  * lib/csv/csv.rb:  Added a :field_size_limit option to control CSV's
-    lookahead and prevent the parser from biting off more data than
-    it can chew.
-  * lib/csv/csv.rb:  Added readers for CSV attributes:  col_sep(), row_sep(),
-    quote_char(), field_size_limit(), converters(), unconverted_fields?(),
-    headers(), return_headers?(), write_headers?(), header_converters(),
-    skip_blanks?(), and force_quotes?().
+	* lib/csv/csv.rb:  Reworked CSV's parser and generator to be m17n.  Data
+	  is now parsed in the Encoding it is in without need for translation.
+	* lib/csv/csv.rb:  Improved inspect() messages for better IRb support.
+	* lib/csv/csv.rb:  Fixed header writing bug reported by Dov Murik.
+	* lib/csv/csv.rb:  Use custom separators in parsing header Strings as
+	  suggested by Shmulik Regev.
+	* lib/csv/csv.rb:  Added a :write_headers option for outputting headers.
+	* lib/csv/csv.rb:  Handle open() calls in binary mode whenever we can to
+	  workaround a Windows issue where line-ending translation can cause an
+	  off-by-one error in seeking back to a non-zero starting position after
+	  auto-discovery for :row_sep as suggested by Robert Battle.
+	* lib/csv/csv.rb:  Improved the parser to fail faster when fed some forms
+	  of invalid CSV that can be detected without reading ahead.
+	* lib/csv/csv.rb:  Added a :field_size_limit option to control CSV's
+	  lookahead and prevent the parser from biting off more data than
+	  it can chew.
+	* lib/csv/csv.rb:  Added readers for CSV attributes:  col_sep(), row_sep(),
+	  quote_char(), field_size_limit(), converters(), unconverted_fields?(),
+	  headers(), return_headers?(), write_headers?(), header_converters(),
+	  skip_blanks?(), and force_quotes?().
 	* lib/csv/csv.rb:  Cleaned up code syntax to be more inline with
 	  Ruby 1.9 than 1.8.
 

encoding.c

@@ -1011,7 +1011,8 @@ rb_enc_default_external(void)
  *
  * Returns default external encoding.
  *
- * It is initialized by the locale or -E option.
+ * It is initialized by the locale or -E option,
+ * and can't be modified after that.
  */
 static VALUE
 get_default_external(VALUE klass)