extended test case on string literals

tests/run/strliterals.pyx

 __doc__ = ur"""
     >>> s1
     b'abc\x11'
+    >>> s1 == b'abc\x11'
+    True
     >>> len(s1)
     4
 
     >>> s2
     b'abc\\x11'
+    >>> s2 == br'abc\x11'
+    True
     >>> len(s2)
     7
 
     >>> s3
     b'abc\\x11'
+    >>> s3 == bR'abc\x11'
+    True
     >>> len(s3)
     7
 
     >>> s4
     b'abc\x11'
+    >>> s4 == b'abc\x11'
+    True
     >>> len(s4)
     4
 
     >>> s5
     b'abc\x11'
+    >>> s5 == B'abc\x11'
+    True
     >>> len(s5)
     4
 
     >>> s6
     b'abc\\x11'
+    >>> s6 == br'abc\x11'
+    True
     >>> len(s6)
     7
 
     >>> s7
     b'abc\\x11'
+    >>> s7 == Br'abc\x11'
+    True
     >>> len(s7)
     7
 
     >>> s8
     b'abc\\x11'
+    >>> s8 == bR'abc\x11'
+    True
     >>> len(s8)
     7
 
+    >>> s9
+    b'abc\\x11'
+    >>> s9 == BR'abc\x11'
+    True
+    >>> len(s9)
+    7
+
     >>> u1
     u'abc\x11'
+    >>> u1 == u'abc\x11'
+    True
     >>> len(u1)
     4
 
     >>> u2
     u'abc\x11'
+    >>> u2 == U'abc\x11'
+    True
     >>> len(u2)
     4
 
     >>> u3
     u'abc\\x11'
+    >>> u3 == ur'abc\x11'
+    True
     >>> len(u3)
     7
 
     >>> u4
     u'abc\\x11'
+    >>> u4 == Ur'abc\x11'
+    True
     >>> len(u4)
     7
 
     >>> u5
     u'abc\\x11'
+    >>> u5 == uR'abc\x11'
+    True
     >>> len(u5)
     7
+
+    >>> u6
+    u'abc\\x11'
+    >>> u6 == UR'abc\x11'
+    True
+    >>> len(u6)
+    7
 """
 
 import sys
 if sys.version_info[0] >= 3:
-    __doc__ = __doc__.replace(u" u'", u" '")
+    __doc__ = __doc__.replace(u" u'", u" '").replace(u" U'", u" '").replace(u" ur'", u" r'").replace(u" uR'", u" R'").replace(u" Ur'", u" r'").replace(u" UR'", u" R'")
 else:
-    __doc__ = __doc__.replace(u" b'", u" '")
+    __doc__ = __doc__.replace(u" b'", u" '").replace(u" B'", u" '").replace(u" br'", u" r'").replace(u" bR'", u" R'").replace(u" Br'", u" r'").replace(u" BR'", u" R'")
 
 s1 = "abc\x11"
 s2 = r"abc\x11"
@@ -79,9 +119,11 @@ s5 = B"abc\x11"
 s6 = br"abc\x11"
 s7 = Br"abc\x11"
 s8 = bR"abc\x11"
+s9 = BR"abc\x11"
 
 u1 = u"abc\x11"
 u2 = U"abc\x11"
 u3 = ur"abc\x11"
 u4 = Ur"abc\x11"
 u5 = uR"abc\x11"
+u6 = UR"abc\x11"