Clean up docs args

[rgriff23]

Minor fixes for #269:

• Bloomerang: rm some extraneous backticks from args in docstrings
• Twilio: escape hyperlink formatting using backslash in the from_ arg

[rgriff23]

@shaunagm hmmm I thought this backslash would work to escape the hyperlink formatting based on reading this:

https://docutils.sourceforge.io/docs/ref/rst/restructuredtext.html#escaping-mechanism

I also got an answer on Stack Overflow which told me it would work.

[shaunagm]

Looks good to me:

FYI if you're having trouble building the docs yourself, there are some proto-instructions here. (I'll be tackling the issue itself tomorrow with a new Parsons contributor.)

[shaunagm]

Oh it looks like your change causes a linting error:

My inclination is to ignore the linting error but we can see what Eliot says.