Added outputs for all plot examples

[iamprayush]

References to other Issues or PRs

#15327

Brief description of what is fixed or changed

Added outputs to all the plots using matplotlib plot directive

Other comments

This should be enough to close the issue.

Release Notes

• plotting
  • Added outputs to all plotting examples in the sphinx docs.

[sympy-bot]

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• plotting
  • Added outputs to all plotting examples in the sphinx docs. (#15366 by @iamprayush)

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#### References to other Issues or PRs
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#15327

#### Brief description of what is fixed or changed
Added outputs to all the plots using matplotlib plot directive

#### Other comments
This should be enough to close the issue.

#### Release Notes

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* plotting
   * Added outputs to all plotting examples in the sphinx docs.
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Update

The release notes on the wiki have been updated.

[iamprayush]

These are the outputs that I received:

[iamprayush]

@moorepants will this be enough to close the issue?

[moorepants]

These look great. +1 to merge once tests pass.

@moorepants will this be enough to close the issue?

Maybe not. I think more work for the beam examples is still needed, among potential other places in the docs that use plots.

[iamprayush]

These look great. +1 to merge once tests pass.

Awesome! Btw, when will the HTML files be updated to actually show these results in the sympy docs website?

And also, does this qualify me to be added in the AUTHORS list?

[moorepants]

They are already there: https://docs.sympy.org/dev/modules/plotting.html

Yes, you will be added to the authors list on the next release.

[iamprayush]

This error doesn't seem to be a consequence of the changes I made. @moorepants can you please confirm?