A variety of cleanups to bring our samples up-to-date.

samples/markdown/block_parser.dart

Index: samples/markdown/block_parser.dart
===================================================================
--- samples/markdown/block_parser.dart	(revision 12654)
+++ samples/markdown/block_parser.dart	(working copy)
@@ -3,39 +3,39 @@
 // BSD-style license that can be found in the LICENSE file.
 
 /// The line contains only whitespace or is empty.
-const _RE_EMPTY = const RegExp(@'^([ \t]*)$');
+final _RE_EMPTY = new RegExp(@'^([ \t]*)$');

[Siggi Cherem (dart-lang), 2012/09/21 00:17:28]

why do we need these changes?

[dgrove, 2012/09/21 00:37:23]

Done.

 
 /// A series of `=` or `-` (on the next line) define setext-style headers.
-const _RE_SETEXT = const RegExp(@'^((=+)|(-+))$');
+final _RE_SETEXT = new RegExp(@'^((=+)|(-+))$');
 
 /// Leading (and trailing) `#` define atx-style headers.
-const _RE_HEADER = const RegExp(@'^(#{1,6})(.*?)#*$');
+final _RE_HEADER = new RegExp(@'^(#{1,6})(.*?)#*$');
 
 /// The line starts with `>` with one optional space after.
-const _RE_BLOCKQUOTE = const RegExp(@'^[ ]{0,3}>[ ]?(.*)$');
+final _RE_BLOCKQUOTE = new RegExp(@'^[ ]{0,3}>[ ]?(.*)$');
 
 /// A line indented four spaces. Used for code blocks and lists.
-const _RE_INDENT = const RegExp(@'^(?:    |\t)(.*)$');
+final _RE_INDENT = new RegExp(@'^(?:    |\t)(.*)$');
 
 /// Three or more hyphens, asterisks or underscores by themselves. Note that
 /// a line like `----` is valid as both HR and SETEXT. In case of a tie,
 /// SETEXT should win.
-const _RE_HR = const RegExp(@'^[ ]{0,3}((-+[ ]{0,2}){3,}|' +
-                                 @'(_+[ ]{0,2}){3,}|' +
+final _RE_HR = new RegExp(@'^[ ]{0,3}((-+[ ]{0,2}){3,}|' 
+                                 @'(_+[ ]{0,2}){3,}|' 
                                  @'(\*+[ ]{0,2}){3,})$');
 
 /// Really hacky way to detect block-level embedded HTML. Just looks for
 /// "<somename".
-const _RE_HTML = const RegExp(@'^<[ ]*\w+[ >]');
+final _RE_HTML = new RegExp(@'^<[ ]*\w+[ >]');
 
 /// A line starting with one of these markers: `-`, `*`, `+`. May have up to
 /// three leading spaces before the marker and any number of spaces or tabs
 /// after.
-const _RE_UL = const RegExp(@'^[ ]{0,3}[*+-][ \t]+(.*)$');
+final _RE_UL = new RegExp(@'^[ ]{0,3}[*+-][ \t]+(.*)$');
 
 /// A line starting with a number like `123.`. May have up to three leading
 /// spaces before the marker and any number of spaces or tabs after.
-const _RE_OL = const RegExp(@'^[ ]{0,3}\d+\.[ \t]+(.*)$');
+final _RE_OL = new RegExp(@'^[ ]{0,3}\d+\.[ \t]+(.*)$');
 
 /// Maintains the internal state needed to parse a series of lines into blocks
 /// of markdown suitable for further inline parsing.