[docs] [issue26506] [EASY] hex() documentation: mention "%x" % int

[Sharan Yalburgi]

Sharan Yalburgi added the comment:

> Hi, did you read http://docs.python.org/devguide/ ? IMHO its a good start. You can also join the https://www.python.org/dev/core-mentorship/ group to get help!

Yes I did. Thank you. I have made a PR. I says I haven't signed CLA yet. I am doing that right now.

> When uploading patch from another person, please include "Original patch by <original author>" in the PR, and the commit message.

Will do that thank you.

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