Fix typo in help.html

[KonstHardy]

Fix typo:

intially -> initially

[the-knights-who-say-ni]

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[nanjekyejoannah]

LGTM, thanks for the fix @KonstHardy. This is simple enough to merge without signing the CLA but please sign it for future PRs. You can also sign for this one if you want before we merge it.

[terryjreedy]

Will explain later

[nanjekyejoannah]

I approved on basis of its a simple typo fixed, I will leave to you @terryjreedy

[terryjreedy]

I understand. What neither of you knew is that idlelib/help.html is a near-copy of the idle.html generated from idle.rst by sphinx. This is done with a function in help.py that removes trailing whitespace and maybe some other stuff. So this file should not be directly edited. idle.rst got this fix two weeks ago in #27903. I ran the update script and will commit the change in #28191.

I did not explain earlier because I was on my way out of my house.