Create the wiki page if it doesn't exist

[asmeurer]

Currently if the wiki page doesn't exist it will fail. It should create it automatically if it doesn't exist yet.

[NupurMunda]

I want to claim this issue

[asmeurer]

Go for it. I'm not presently working on any bot stuff.

[NupurMunda]

I actually new to it. Thats' why I need bit help. I am having few doubts.

…

On Thu, Nov 22, 2018 at 11:21 PM Aaron Meurer ***@***.***> wrote: Go for it. I'm not presently working on any bot stuff. — You are receiving this because you commented. Reply to this email directly, view it on GitHub <#26 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/Ae4_jmoWG2jRd5YXswWK9KEbdKlALvCwks5uxuQEgaJpZM4V03Vv> .

[asmeurer]

The code to write to the wiki is already there. It should be modified to check if the file exists, and if it doesn't, write out a template, which would be the like the current release notes file minus the changes.

[asmeurer]

Specifically, currently if the page doesn't exist this line will result in an error

sympy-bot/sympy_bot/update_wiki.py

Line 65 in 770679d

with open(release_notes_file, 'r') as f: