Fixing some broken links.

CHANGES.rst

@@ -2180,9 +2180,9 @@ Features added
 
 * GDB support. http://docs.cython.org/src/userguide/debugging.html
 
-* A new build system with support for inline distutils directives, correct dependency tracking, and parallel compilation. http://wiki.cython.org/enhancements/distutils_preprocessing
+* A new build system with support for inline distutils directives, correct dependency tracking, and parallel compilation. https://github.com/cython/cython/wiki/enhancements-distutils_preprocessing
 
-* Support for dynamic compilation at runtime via the new cython.inline function and cython.compile decorator. http://wiki.cython.org/enhancements/inline
+* Support for dynamic compilation at runtime via the new cython.inline function and cython.compile decorator. https://github.com/cython/cython/wiki/enhancements-inline
 
 * "nogil" blocks are supported when compiling pure Python code by writing "with cython.nogil".
 

docs/src/tutorial/strings.rst

@@ -467,7 +467,7 @@ supports the ``__future__`` import ``unicode_literals`` that instructs
 the parser to read all unprefixed :obj:`str` literals in a source file as
 unicode string literals, just like Python 3.
 
-.. _`CEP 108`: http://wiki.cython.org/enhancements/stringliterals
+.. _`CEP 108`: https://github.com/cython/cython/wiki/enhancements-stringliterals
 
 Single bytes and characters
 ---------------------------

docs/src/userguide/external_C_code.rst

@@ -587,7 +587,7 @@ header::
 
 If the callback may be called from another non-Python thread,
 care must be taken to initialize the GIL first, through a call to
-`PyEval_InitThreads() <http://docs.python.org/dev/c-api/init.html#PyEval_InitThreads>`_.
+`PyEval_InitThreads() <https://docs.python.org/dev/c-api/init.html#c.PyEval_InitThreads>`_.
 If you're already using  :ref:`cython.parallel <parallel>` in your module, this will already have been taken care of.
 
 The GIL may also be acquired through the ``with gil`` statement::

docs/src/userguide/memoryviews.rst

@@ -171,8 +171,10 @@ As for NumPy, new axes can be introduced by indexing an array with ``None`` ::
     # 2D array with shape (50, 1)
     myslice[:, None]
 
+    # 3D array with shape (1, 10, 1)
+    myslice[None, 10:-20:2, None]
+
 One may mix new axis indexing with all other forms of indexing and slicing.
-See also an example_.
 
 Read-only views
 ---------------