Fixes #163 - small fix in the mangling logic, renames all expected test files

test/data/expected/html_escape_test.html.html.txt

Index: test/data/expected/html_escape_test.html.html.txt
diff --git a/test/data/expected/html_escape_test.html.html.txt b/test/data/expected/html_escape_test.html.html.txt
deleted file mode 100644
index a8a18a4cd7e64c47208854d4bbc3364d644bc028..0000000000000000000000000000000000000000
--- a/test/data/expected/html_escape_test.html.html.txt
+++ /dev/null
@@ -1,27 +0,0 @@
-Blocked access to external URL http://dart.googlecode.com/svn/branches/bleeding_edge/dart/client/dart.js
-Blocked access to external URL http://dart.googlecode.com/svn/branches/bleeding_edge/dart/client/dart.js
-Content-Type: text/plain
-layer at (0,0) size 800x600
-  RenderView at (0,0) size 800x600
-layer at (0,0) size 800x134
-  RenderBlock {HTML} at (0,0) size 800x134
-    RenderBody {BODY} at (8,13) size 784x113
-      RenderBlock {PRE} at (0,0) size 784x80
-        RenderText {#text} at (0,0) size 528x80
-          text run at (0,0) width 528: "Here's some HTML with some triple quotes and escape sequences: '''"
-          text run at (528,0) width 0: " "
-          text run at (0,16) width 520: "    This $text uses \\r\\n and \\backslash \\ to break your compiler."
-          text run at (520,16) width 0: " "
-          text run at (0,32) width 48: "  '''."
-          text run at (48,32) width 0: " "
-          text run at (0,48) width 352: "  But it hopes your compiler does not break!"
-          text run at (352,48) width 0: " "
-          text run at (0,64) width 16: "  "
-      RenderBlock (anonymous) at (0,93) size 784x20
-        RenderText {#text} at (0,0) size 225x19
-          text run at (0,0) width 225: "While we're at it, here's a cool entity: "
-        RenderInline {SPAN} at (0,0) size 8x19
-          RenderText {#text} at (225,0) size 8x19
-            text run at (225,0) width 8: "\x{192}"
-        RenderText {#text} at (0,0) size 0x0
-#EOF