Four entries for Armstrong Number

[SpiderMath]

Description of the content report

I found 4 entries for 'armstrong', all of which are for the same thing but for different languages.

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Additional information/context

The links to the entries are:

• https://the-algorithms.com/algorithm/armstrong-number
• https://the-algorithms.com/algorithm/armstrong-numbers
• https://the-algorithms.com/algorithm/armstrong
• https://the-algorithms.com/algorithm/is-armstrong

[maltejur]

Fixed in b0f602e