[Haml] Fix a parsing bug for HTML-style attributes.

doc-src/HAML_CHANGELOG.md

@@ -15,6 +15,8 @@
   make sure error reporting uses the correct line numbers,
   and allow multi-line expressions.
 
+* Fix a parsing bug for HTML-style attributes including `#`.
+
 ## [2.2.17](http://github.com/nex3/haml/commit/2.2.16)
 
 * Fix compilation of HTML5 doctypes when using `html2haml`.

lib/haml/precompiler.rb

@@ -673,7 +673,7 @@ END
         return name, [:dynamic, var]
       end
 
-      re = /((?:\\.|\#[^{]|[^#{quote}\\#])*#?)(#{quote}|#\{)/
+      re = /((?:\\.|\#(?!\{)|[^#{quote}\\#])*)(#{quote}|#\{)/
       content = []
       loop do
         return false unless scanner.scan(re)

test/haml/engine_test.rb

@@ -607,6 +607,15 @@ HTML
 HAML
   end
 
+  def test_html_attributes_with_hash
+    assert_equal("<a href='#' rel='top'>Foo</a>\n",
+      render('%a(href="#" rel="top") Foo'))
+    assert_equal("<a href='#'>Foo</a>\n",
+      render('%a(href="#") #{"Foo"}'))
+
+    assert_equal("<a href='#\"'></a>\n", render('%a(href="#\\"")'))
+  end
+
   # HTML escaping tests
 
   def test_ampersand_equals_should_escape