Glitch in the header for getting access token?

[Amr_Hesham]

Country

Egypt

Device

iPhone 16 Pro Max Simulator (XCode)

Operating System

Sequoia 15.3.1 

My Question or Issue

I am a fresh iOS developer(So please be easy on me if I am wrong), I was trying to follow a tutorial however, I noticed something I am not sure if it is a bug or that's how it should be however in this code: 

var request = URLRequest(url: url)

        request.httpMethod = "POST"

        request.setValue("application/x-www-form-urlencoded.", forHTTPHeaderField: "Content-Typ")

I had the "application/x-www-form-urlencoded." with the extra "."

And a typo in the header as it was missing the "e". However, it still worked just fine.

When I added an "e" and kept the "." as in :

request.setValue("application/x-www-form-urlencoded.", forHTTPHeaderField: "Content-Type")

it failed as it was in an incorrect format

However, if I remove the "."  and add the "e" it works just fine 

request.setValue("application/x-www-form-urlencoded", forHTTPHeaderField: "Content-Type")

I am not sure if there is something I am unaware but I am kinda suspicious that it is not how it should work no?

[Amr_Hesham · Accepted solution]

OK nvm, I figured out this is normal after I asked a back-end friend and he explained what's going on, not sure how to delete a post here.
Here, but Yes a false flag sorry