[Little Sister's Vocab/Essay]: Update About.md to Include removeprefix and removesuffix

Python 3.9 introduces two new string methods that make removing prefixes and suffixes easier.

Little Sisters Vocab has the student remove prefixes and suffixes, but uses Python 3.8 methods. Its follow-on exercise Little Sisters Essay has the student work with startswith() and endswith().

We should note in the string-methods about.md (and possibly in the about.md of strings) that is displayed after the student finishes Little Sisters Essay that Python 3.9 introduces some methods of convenience around removing prefixes and suffixes:

• removeprefix()
• removesuffix()

We should also include code examples of common usage.

[BethanyG]

@kana800 - Certainly! 🎉

Below are some additional links to exercism docs. Let I or @J08K know if you have any questions or issues!

• Contributing to Exercism | Help
• What are those Weird Task Tags about?
• Building Language Tracks: An Overview
• What are Concepts?
• Concept Exercise Specifications
• Exercism Formatting and Style Guide
• Exercism Markdown Specification

[kana800]

Hi @BethanyG / @J08K,

first of all really sorry about the late reply. I took a deeper dive into the issue and before starting to work on the pull request, I wanted to ask some questions.

In little-sister-vocab concept.

1. Do I need to mention about removeprefix and removesuffix in introduction.md, hints.md or just in hints.md ?.
2. Also only remove a suffix from a word is mentioned in the little-sister-vocab concept. Do I need to include about the removesuffix() method?
3. Do I need to change the .meta/exemplar.py file as well ?

In concepts/strings-methods/about.md, I can do a simple introduction of the new concepts of

• removeprefix()
• removesuffix() I dont see the point of mentioning above methods in about.md in strings, If you want to let me know!