Drop support for EOL Python 2.6

Author: hugovk

.travis.yml

@@ -7,8 +7,6 @@ matrix:
       env: TOXENV=check
     - python: '3.6'
       env: TOXENV=docs
-    - python: '2.6'
-      env: TOXENV=py26-pytestrelease
     - python: '2.7'
       env: TOXENV=py27-pytestrelease
     - python: '3.3'

appveyor.yml

@@ -3,7 +3,6 @@ environment:
   # note: please use "tox --listenvs" to populate the build matrix below
   - TOXENV: "check"
   - TOXENV: "docs"
-  - TOXENV: "py26-pytestrelease"
   - TOXENV: "py27-pytestrelease"
   - TOXENV: "py34-pytestrelease"
   - TOXENV: "py35-pytestrelease"

pluggy/__init__.py

@@ -609,7 +609,7 @@ def __call__(self, *args, **kwargs):
                 kwargs.keys())
             if notincall:
                 warnings.warn(
-                    "Argument(s) {0} which are declared in the hookspec "
+                    "Argument(s) {} which are declared in the hookspec "
                     "can not be found in this hook call"
                     .format(tuple(notincall)),
                     stacklevel=2,

setup.py

@@ -14,7 +14,7 @@
     'Programming Language :: Python :: Implementation :: CPython',
     'Programming Language :: Python :: Implementation :: PyPy'] + [
     ('Programming Language :: Python :: %s' % x) for x in
-    '2 2.6 2.7 3 3.3 3.4 3.5 3.6'.split()]
+    '2 2.7 3 3.3 3.4 3.5 3.6'.split()]
 
 with open('README.rst') as fd:
     long_description = fd.read()

tox.ini

@@ -1,5 +1,5 @@
 [tox]
-envlist=check,docs,py{26,27,34,35,36,py}-pytestrelease,py{27,36}-pytest{master,features}
+envlist=check,docs,py{27,34,35,36,py}-pytestrelease,py{27,36}-pytest{master,features}
 
 [testenv]
 commands=py.test {posargs:testing/}