Fixed changing the delimiter

Changing the delimiter and use the new one on the
same line was broken. Fixed that and extended the
test suite.

examples/delimiters.html

@@ -1,6 +1,6 @@
-{{=<% %>=}}
-* <% first %>
+{{=<% %>=}}* <% first %>
+* <% second %>
 <%=| |=%>
-* | second |
+* | third |
 |={{ }}=|
-* {{ third }}
+* {{ fourth }}

examples/delimiters.js

@@ -1,5 +1,6 @@
 var delimiters = {
   first: "It worked the first time.",
   second: "And it worked the second time.",
-  third: "Then, surprisingly, it worked the third time."
+  third: "Then, surprisingly, it worked the third time.",
+  fourth: "Fourth time also fine!."
 }

examples/delimiters.txt

@@ -1,7 +1,6 @@
-
 * It worked the first time.
-
 * And it worked the second time.
 
 * Then, surprisingly, it worked the third time.
 
+* Fourth time also fine!.

mustache.js

@@ -1,6 +1,7 @@
 /*
   Shamless port of http://github.com/defunkt/mustache
-  by Jan Lehnardt <jan@apache.org>, Alexander Lang <alex@upstream-berlin.com>
+  by Jan Lehnardt <jan@apache.org>, Alexander Lang <alex@upstream-berlin.com>,
+     Sebastian Cohnen <sebastian.cohnen@googlemail.com>
 
   Thanks @defunkt for the awesome code.
   
@@ -106,6 +107,8 @@ var Mustache = function() {
                     case "=": // set new delimiters, rebuild the replace regexp
                       that.set_delimiters(name);
                       regex = new_regex();
+                      // redo the line in order to get tags with the new delimiters on the same line
+                      i--;
                       return "";
                     case "<": // render partial
                       return that.render_partial(name, context);