Add a docstring to Request.respond()

[Bluenix2]

Without a docstring this method will not show up in the Sphinx documentation.

See this relevant Discord conversation for information on how it was discovered.

[codecov]

Codecov Report

Merging #2409 (371284f) into main (7523e87) will increase coverage by 0.059%.
The diff coverage is n/a.

@@              Coverage Diff              @@
##              main     #2409       +/-   ##
=============================================
+ Coverage   87.110%   87.170%   +0.059%     
=============================================
  Files           60        60               
  Lines         5004      5004               
  Branches       905       905               
=============================================
+ Hits          4359      4362        +3     
+ Misses         472       470        -2     
+ Partials       173       172        -1     

Impacted Files	Coverage Δ
sanic/request.py	96.187% <ø> (ø)
sanic/server/protocols/http_protocol.py	88.095% <0.000%> (+3.571%)	⬆️

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[Bluenix2]

I originally did so, BaseHTTPResponse more specifically because it would match the parameter, but it failed type checks as seen here.

I could not figure out how or why it failed so I reverted that change. It did not fix the seemingly unrelated test failure though.

[ahopkins]

I originally did so, BaseHTTPResponse more specifically because it would match the parameter, but it failed type checks as seen here.

I could not figure out how or why it failed so I reverted that change. It did not fix the seemingly unrelated test failure though.

I made a couple of changes. We can worry about the type annotation issue another time.

[ahopkins]

Great change. I'll deal with the flaky tests 🤬