Fix path clipping
PEP8
Example of embedding a figure into a Tk canvas
[examples] fix pep8 errors E26*

and minor modification of the output of autopep8 where appropriate
[examples] switch to print function everywhere + fix E211

Signed-off-by: Thomas Hisch <t.hisch@gmail.com>
Merge pull request #3485 from jkseppan/reduce-xobjects

ENH : Reduce the use of XObjects in pdf backend
Merge remote-tracking branch 'pipping/master'

Conflicts:
	examples/api/scatter_piecharts.py

White space induced conflicts

Conflicts:
	examples/api/scatter_piecharts.py
Merge pull request #3298 form mbdoom/arc-bug

BUG : Wedge not honouring specified angular range

Fixed minor PEP8 as part of merge
Merge pull request #1751 from mdboom/path-clipping

BUG : Polygon is corrupted with SVG backend in a certain condition
remove _orig_color which is duplicate of _rgb
Change order of includes for Ubuntu
DOC : added google tarcking code
Merge pull request #3686 from tacaswell/tracking

DOC : added google tarcking code
Fix drawing of markers with no stroke
Improve marker_edge test for this case
Remove the check on path length over 18980 in Cairo backend
adding legend handler for PolyCollection
adding labels to stackplot
removing comments and unnecessary line changes
added test image and entry in whats_new