chore: fix some documentation inconsistencies

[charles-cooper]

• raw_args kwarg to create_from_blueprint
• fix create_from_blueprint example
• clarify "all but one 64th" behavior when forwarding gas left

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[codecov-commenter]

Codecov Report

Merging #3624 (c343fdf) into master (1e9922d) will increase coverage by 0.03%.
Report is 1 commits behind head on master.
The diff coverage is 0.00%.

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@@            Coverage Diff             @@
##           master    #3624      +/-   ##
==========================================
+ Coverage   89.01%   89.05%   +0.03%     
==========================================
  Files          86       86              
  Lines       11455    11455              
  Branches     2607     2607              
==========================================
+ Hits        10197    10201       +4     
+ Misses        836      832       -4     
  Partials      422      422              

Files	Coverage Δ
.../codegen/function_definitions/external_function.py	100.00% <ø> (ø)
vyper/semantics/analysis/local.py	91.68% <ø> (ø)
vyper/semantics/analysis/module.py	89.94% <ø> (ø)
vyper/builtins/functions.py	90.55% <0.00%> (ø)

... and 1 file with indirect coverage changes

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