polish 'Understanding WebAssembly text format'

[nichol20]

Description

• fix typos and minor grammatical errors
• update the example code by correcting the size of the string in memory and adding a helpful comment (I used multi-memory.wat as a base)
• add a helpful note for the reader who is trying to follow along

Motivation

I was reading the article and noticed a few places that could be clarified and corrected to make the article easier to follow.

Additional details

Related issues and pull requests

[chrisdavidmills]

Hi @nichol20, and thank you for your contribution. Your changes look good. While I was here, I also added some minor grammatical improvements; I hope you don't mind. I basically just ran Grammarly on the article text and selected the suggestions that made sense, plus I also added in a few of my own.

[github-actions]

Preview URLs

• /en-US/docs/WebAssembly/Guides/Understanding_the_text_format

External URLs (6)

URL: /en-US/docs/WebAssembly/Guides/Understanding_the_text_format
Title: Understanding WebAssembly text format

• https://github.com/WebAssembly/threads/blob/main/proposals/threads/Overview.md (2 times) (Note! This may be a new URL 👀)
• https://github.com/WebAssembly/tool-conventions/blob/main/DynamicLinking.md (1 time) (Note! This may be a new URL 👀)
• https://github.com/WebAssembly/wabt (1 time) (Note! This may be a new URL 👀)
• https://webassembly.github.io/spec/core/binary/modules.html (1 time) (Note! This may be a new URL 👀)
• https://webassembly.github.io/spec/core/exec/index.html (2 times) (Note! This may be a new URL 👀)
• https://webassembly.github.io/spec/core/intro/overview.html?highlight=linear+memory (1 time) (Note! This may be a new URL 👀)

[nichol20]

Hi @nichol20, and thank you for your contribution. Your changes look good. While I was here, I also added some minor grammatical improvements; I hope you don't mind. I basically just ran Grammarly on the article text and selected the suggestions that made sense, plus I also added in a few of my own.

Thank you! I appreciate your help. Excellent work.