Included documentation of secondary files

[Mackenzie-OO7]

This PR:

• solves secondaryFiles are undocumented common-workflow-language#270
• fixes typos and punctuation errors
• paraphrases some sentences to be better understood

[kinow]

Quick review during lunch break 🏃‍♂️ Thanks @Mackenzie-OO7 !

[Mackenzie-OO7]

@kinow Thanks for reviewing. I've implemented the changes you suggested.

[swzCuroverse]

@kinow Thanks for reviewing. I've implemented the changes you suggested.

Hi all - My only concern is 2 things
(1) making sure people know making a template is optional
(2) you can use a shortcut to adding secondary files. It need not include all of those parts. For example:
vcfgz:
type: File
secondaryFiles: [.txt]

Would be valid in this case

[swzCuroverse]

@tetron can you give your take on secondary files and then merge when we resolve the issue?

[Mackenzie-OO7]

@swzCuroverse I've made some changes, is it okay now?

[tetron]

@Mackenzie-OO7 could you give this pull request a more descriptive title? The PR title does not indicate that you are added documentation about secondary files.

[Mackenzie-OO7]

@Mackenzie-OO7 could you give this pull request a more descriptive title? The PR title does not indicate that you are added documentation about secondary files.

Alright. Is it better now?

[tetron]

Alright. Is it better now?

Yes, thank you!

[Mackenzie-OO7]

@tetron I've made the changes requested.

[swzCuroverse]

@Mackenzie-OO7

Happy to get you back working on this. I believe the issues is that you are describing what the parser does more than what the user will do in the last section --- Let me make some suggestions on the text.