Change some mercurial/ hg.python.org references. (#8)

diff --git a/Doc/faq/general.rst b/Doc/faq/general.rst
index f1e33af..8f6a907 100644
--- a/Doc/faq/general.rst
+++ b/Doc/faq/general.rst
@@ -159,7 +159,7 @@
 
 The latest Python source distribution is always available from python.org, at
 https://www.python.org/downloads/.  The latest development sources can be obtained
-via anonymous Mercurial access at https://hg.python.org/cpython.
+at https://github.com/python/cpython/.
 
 The source distribution is a gzipped tar file containing the complete C source,
 Sphinx-formatted documentation, Python library modules, example programs, and
@@ -222,8 +222,8 @@
 newsgroups and on the Python home page at https://www.python.org/; an RSS feed of
 news is available.
 
-You can also access the development version of Python through Mercurial.  See
-https://docs.python.org/devguide/faq.html for details.
+You can also access the development version of Python through Git.  See
+`The Python Developer's Guide <https://docs.python.org/devguide/>`_ for details.
 
 
 How do I submit bug reports and patches for Python?
diff --git a/Lib/idlelib/help.html b/Lib/idlelib/help.html
index ffc03c4..f10cd34 100644
--- a/Lib/idlelib/help.html
+++ b/Lib/idlelib/help.html
@@ -90,7 +90,7 @@
 
   <div class="section" id="idle">
 <span id="id1"></span><h1>25.5. IDLE<a class="headerlink" href="#idle" title="Permalink to this headline">¶</a></h1>
-<p><strong>Source code:</strong> <a class="reference external" href="https://hg.python.org/cpython/file/3.5/Lib/idlelib/">Lib/idlelib/</a></p>
+<p><strong>Source code:</strong> <a class="reference external" href="https://github.com/python/cpython/tree/3.5/Lib/idlelib">Lib/idlelib/</a></p>
 <hr class="docutils" id="index-0" />
 <p>IDLE is Python&#8217;s Integrated Development and Learning Environment.</p>
 <p>IDLE has the following features:</p>
diff --git a/Tools/README b/Tools/README
index 73ce6a7..3552881 100644
--- a/Tools/README
+++ b/Tools/README
@@ -43,4 +43,4 @@
                 discovery.
 
 
-(*) A generic benchmark suite is maintained separately at http://hg.python.org/benchmarks/
+(*) A generic benchmark suite is maintained separately at https://github.com/python/performance
diff --git a/Tools/importbench/README b/Tools/importbench/README
index 81a5544..6ba386c 100644
--- a/Tools/importbench/README
+++ b/Tools/importbench/README
@@ -3,4 +3,4 @@
 It should not be used as an overall benchmark of import performance, but rather
 an easy way to measure impact of possible code changes. For a real-world
 benchmark of import, use the normal_startup benchmark from
-hg.python.org/benchmarks.
+https://github.com/python/performance