Added Moyal Distribution

[Smit-create]

Added Moyal Distribution

References to other Issues or PRs

#14881

Brief description of what is fixed or changed

Other comments

Release Notes

• stats
  • Added moyal distribution

[sympy-bot]

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• stats
  • Added moyal distribution (#18446 by @Smit-create)

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<!-- Your title above should be a short description of what
was changed. Do not include the issue number in the title. -->
Added Moyal Distribution
#### References to other Issues or PRs
<!-- If this pull request fixes an issue, write "Fixes #NNNN" in that exact
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#14881

#### Brief description of what is fixed or changed


#### Other comments


#### Release Notes

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* stats
  * Added moyal distribution
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Update

The release notes on the wiki have been updated.

[ethankward]

Tests can be simplified after #18451.

[codecov]

Codecov Report

Merging #18446 into master will increase coverage by 0.001%.
The diff coverage is 74.509%.

@@             Coverage Diff              @@
##            master   #18446       +/-   ##
============================================
+ Coverage   75.319%   75.32%   +0.001%     
============================================
  Files          639      640        +1     
  Lines       167150   167169       +19     
  Branches     39418    39428       +10     
============================================
+ Hits        125896   125912       +16     
- Misses       35710    35720       +10     
+ Partials      5544     5537        -7

[czgdp1807]

Diff coverage is low, can you see which coverable lines are missed?

[Smit-create]

I am getting 100% diff coverage after removing numeric tests

[Smit-create]

@czgdp1807 Please review. I don't know how diff coverage is changing, running locally it shows that I covered everything in the diff, also with the first commit the bot showed 100% diff coverage and then it got decreased surprisingly.

[czgdp1807]

It looks like an issue with Codecov, it is using incorrect diffs. LGTM. Will merge if no one objects for some time.