Include embed titles in all tags (#2419)

* Add title and remove heading

+ also changed any mentioning of `!tags` command

* Fixed yaml scan errors

+ using tabs instead of spaces

+ enclosed title in `comparison.md` with quotes

* Implement ChrisLovering reviews

+ changed all "Name1 vs. Name2" to "Name1 vs. name2"

+ changed "python discord" to "Python Discord" in titles

+ fix typos

+ reverting hunk for `dotenv.md`

+ changed all title cases to sentence cases

* fix grammar

+ changed "embed" to "embeds"

* remove other ot channels mentioned except ot2

* Fix mistakenly removing a blank line

When working with strip, lstrip, or rstrip, you might think that this would be the case:

>>> "Monty Python".rstrip(" Python")
"Monty"

While this seems intuitive, it would actually result in:

"M"

as Python interprets the argument to these functions as a set of characters rather than a substring.

If you want to remove a prefix/suffix from a string, str.removeprefix and str.removesuffix are recommended and were added in 3.9.

>>> "Monty Python".removesuffix(" Python")
"Monty"

See the documentation of str.removeprefix and str.removesuffix for more information.