Global base indention

[lorenzwalthert]

Solves #641 by adding spaces before ever token on a new line. Note that multi-line strings are just one token.

[codecov-commenter]

Codecov Report

Merging #649 into master will increase coverage by 0.03%.
The diff coverage is 94.91%.

@@            Coverage Diff             @@
##           master     #649      +/-   ##
==========================================
+ Coverage   90.38%   90.42%   +0.03%     
==========================================
  Files          47       47              
  Lines        2194     2224      +30     
==========================================
+ Hits         1983     2011      +28     
- Misses        211      213       +2     

Impacted Files	Coverage Δ
R/addins.R	0.00% <0.00%> (ø)
R/roxygen-examples.R	97.22% <100.00%> (+0.34%)	⬆️
R/testing.R	76.27% <100.00%> (+0.83%)	⬆️
R/transform-block.R	100.00% <100.00%> (ø)
R/transform-files.R	100.00% <100.00%> (ø)
R/ui-styling.R	100.00% <100.00%> (ø)

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