Update generated doc strings and make generate

[r-hang]

Update generated doc strings and make generate

These changes are the result of:

• Re-tabbing the doc string generation logic of gen/enum.go and gen/field.go
• running 'GO111MODULE=on make generate' on dev.

These steps are performed to update generated code, make the generated code compliant with gofmt, and resolve release issues ahead of time.

[tchung1118]

Seems like CI failed?

[codecov[bot]]

Codecov Report

Merging #580 (615c7c0) into dev (9197231) will not change coverage. The diff coverage is n/a.

@@           Coverage Diff           @@
##              dev     #580   +/-   ##
=======================================
  Coverage   68.01%   68.01%           
=======================================
  Files         142      142           
  Lines       23878    23878           
=======================================
  Hits        16241    16241           
  Misses       4577     4577           
  Partials     3060     3060           

Impacted Files	Coverage Δ
gen/enum.go	99.00% <ø> (ø)
gen/field.go	91.34% <ø> (ø)
gen/internal/tests/collision/collision.go	65.63% <ø> (ø)
gen/internal/tests/containers/containers.go	56.88% <ø> (ø)
...um-text-marshal-strict/enum-text-marshal-strict.go	77.31% <ø> (ø)
gen/internal/tests/enum_conflict/enum_conflict.go	72.34% <ø> (ø)
gen/internal/tests/enums/enums.go	83.40% <ø> (ø)
gen/internal/tests/exceptions/exceptions.go	60.35% <ø> (ø)
.../internal/tests/hyphenated-file/hyphenated-file.go	60.67% <ø> (ø)
.../internal/tests/hyphenated_file/hyphenated_file.go	60.67% <ø> (ø)
... and 9 more

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