improve formatting of generated tf code

[ryanking]

Collapse all vertical whitespaces (runs of \n) in generated code to reduce the number of whitespace-only diffs that fogg generates.

Post 0.12 the terraform fmt command avoids managing vertical whitespace (ie newlines).

That decision combined with our use fo go templates, wherein is it at best annoying and at worse impossible to reliably manage vertical whitespace the way we want to means that we havegiven up on avoiding diffs with meaningless whitespace changes.

From here forward we will collapse all \n+ to \n in generated code. This will mostly only affect fogg.tf, which is exactly what we want.

Test Plan

• CI
• manually tested on shared-infra repo

References

• terraform fmt should add an empty line at the end of the file hashicorp/terraform#23223 (comment)

[codecov-io]

Codecov Report

Merging #474 into master will increase coverage by 0.09%.
The diff coverage is 83.33%.

@@            Coverage Diff             @@
##           master     #474      +/-   ##
==========================================
+ Coverage   61.12%   61.22%   +0.09%     
==========================================
  Files          19       19              
  Lines        1955     1960       +5     
==========================================
+ Hits         1195     1200       +5     
  Misses        607      607              
  Partials      153      153              

Impacted Files	Coverage Δ
apply/apply.go	64.02% <83.33%> (+0.65%)	⬆️

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