Add warning on documentation for stop of python 2 support.

docs/source/conf.py

@@ -83,6 +83,8 b" templates_path = ['_templates']"
 # The suffix of source filenames.
 source_suffix = '.rst'
 
+rst_prolog = ''
+
 def is_stable(extra):
     for ext in {'dev', 'b', 'rc'}:
         if ext in extra:
@@ -93,13 +95,22 b" if is_stable(iprelease['_version_extra']):"
     tags.add('ipystable')
 else:
     tags.add('ipydev')
-    rst_prolog = """
-    .. warning::
+    rst_prolog += """
+.. warning::
+
+    This documentation is for a development version of IPython. There may be
+    significant differences from the latest stable release.
+"""
+
+rst_prolog += """
+.. important::
 
-        This documentation is for a development version of IPython. There may be
-        significant differences from the latest stable release.
+    This is the documentation for IPython version > 6.0 which is had
+    stopped compatibility for python version lower than 3.3. If you are
+    looking for a version of IPython compatible with python 2.7 please see
+    the documentation for the IPython 5.x LTS (Long term support branch)
 
-    """
+"""
 
 # The master toctree document.
 master_doc = 'index'

docs/source/coredev/release_process.rst

@@ -170,6 +170,12 b' Get a fresh clone of the tag for building the release::'
 8. Run the release script
 -------------------------
 
+.. important::
+
+    Following releases instructions have information to release IPython 5.x and
+    6.x both on python 2 and python 3. When reasing IPython 6+, ignore the step
+    for python2. 
+
 Run the ``release`` script, this step requires having a current wheel, Python
 >=3.4 and Python 2.7.::
 
@@ -189,7 +195,7 b' It should posts them to ``archive.ipython.org``.'
 
 You will need to use `twine <https://github.com/pypa/twine>`_ ) manually to
 actually upload on PyPI. Unlike setuptools, twine is able to upload packages
-over SSL.
+over SSL::
 
     twine upload dist/*
 

docs/source/overview.rst

@@ -239,7 +239,8 b' This functionality is optional and now part of the `ipyparallel'
 Portability and Python requirements
 -----------------------------------
 
-As of the 2.0 release, IPython works with Python 2.7 and 3.3 or above.
+Version 6.0 of IPython work with python 3.3 and above.
+Version 2.0 to 5 works with Python 2.7 and 3.3 or above.
 Version 1.0 additionally worked with Python 2.6 and 3.2.
 Version 0.12 was the first version to fully support Python 3.