Now at--

    Ran 159 tests in 0.502s
    FAILED (failures=12)

Now at--

    Ran 160 tests in 0.755s
    FAILED (errors=1, failures=18)

Now at--

    Ran 160 tests in 0.471s

    FAILED (errors=1, failures=24)

Added two keyword arguments to Template.__init__(): "default_encoding" and
"decode_errors".  These are passed internally to unicode() as the "encoding"
and "errors" arguments when converting strings of type str to unicode.

From the issue:

    The constructor `Template.__init__()` should accept an optional
    `escape` function argument instead of the boolean `disable_escape`.
    This is more natural.

    Examples:

     * Users wanting to disable escaping can pass `lambda s: s`.
     * Non-markupsafe users wanting double-quotes escaped can pass
       `lambda s: cgi.escape(s, True)`.  The cgi.escape() function
       doesn't escape double-quotes by default.
     * Similarly, markupsafe users can specify an alternative to
       `markupsafe.escape()`.

The above change was initially made for testing purpose.  The unit
tests now run the test cases in test_pystache.py twice if markupsafe
is available: once with markupsafe enabled and once without.  All
unit tests now pass using markupsafe (there was previously one
failing test in test_pystache.py: test_non_strings).

 * Used re.split() instead of re.search() to avoid string slicing.
 * Used "".join() once instead of concatenating strings.
 * Removed the need for repeating logic on loop exit (i.e. an additional
   application of self._render_tags(template) and output += ...).