Fix: simple_format with blank wrapper_tag option returns plain html tag.

[akhilgkrishnan]

Partially Fixes #44948

By default simple_format method returns the text wrapped with <p>. But if we explicitly specify the wrapper_tag: nil in the options, it returns the text wrapped with <></> tag.

simple_format("Hello World")
# <p>Hello World</p>

simple_format("Hello World", {},  {wrapper_tag: "div"})
# <div>Hello World</div>

simple_format("Hello World", {},  {wrapper_tag: nil})
# <>Hello World</>

Detail

In this PR, it updates the behavior of the simple_format helper, If the user passes nil or an empty string as a value for wrapper_tag it defaults to use the <p> tag for wrapping.

simple_format("Hello World", {},  {wrapper_tag: "div"})
# <div>Hello World</div>

simple_format("Hello World", {},  {wrapper_tag: nil})
# <p>Hello World</p>

Co-authored-by: @JunichiIto

Checklist

Before submitting the PR make sure the following are checked:

• This Pull Request is related to one change. Changes that are unrelated should be opened in separate PRs.
• Commit message has a detailed description of what changed and why. If this PR fixes a related issue include it in the commit message. Ex: [Fix #issue-number]
• Tests are added or updated if you fix a bug or add a feature.
• CHANGELOG files are updated for the changed libraries if there is a behavior change or additional feature. Minor bug fixes and documentation changes should not be included.

[byroot]

Thanks, please just fix the changelog and after that I'll merge.

[byroot]

Thank you!