Update Scalafmt to 2.5.2

[travisbrown]

Like #3409 but includes the formatting changes. I've changed one thing besides the version in the configuration: I removed RedundantBraces, since it was resulting in a lot of bare nested if expressions that I thought hurt readability. This gets us a little closer to the defaults, anyway.

Note: if we don't remove RedundantBraces, the diff is even larger:

 283 files changed, 4108 insertions(+), 3472 deletions(-)

So this both gets us closer to the current default and keeps us closer to our old formatting.

[codecov-commenter]

Codecov Report

Merging #3425 into master will increase coverage by 0.00%.
The diff coverage is 82.83%.

@@           Coverage Diff           @@
##           master    #3425   +/-   ##
=======================================
  Coverage   91.64%   91.64%           
=======================================
  Files         381      381           
  Lines        8268     8271    +3     
  Branches      227      227           
=======================================
+ Hits         7577     7580    +3     
  Misses        691      691           

Flag	Coverage Δ
#scala_version_212	91.63% <82.83%> (+<0.01%)	⬆️
#scala_version_213	91.43% <82.32%> (+<0.01%)	⬆️

Impacted Files	Coverage Δ
...lleycats-core/src/main/scala/alleycats/ConsK.scala	0.00% <0.00%> (ø)
...lleycats-core/src/main/scala/alleycats/Empty.scala	0.00% <0.00%> (ø)
...leycats-core/src/main/scala/alleycats/EmptyK.scala	0.00% <0.00%> (ø)
...eycats-core/src/main/scala/alleycats/Extract.scala	0.00% <0.00%> (ø)
alleycats-core/src/main/scala/alleycats/One.scala	0.00% <0.00%> (ø)
alleycats-core/src/main/scala/alleycats/Pure.scala	0.00% <0.00%> (ø)
alleycats-core/src/main/scala/alleycats/Zero.scala	0.00% <0.00%> (ø)
...la/alleycats/laws/discipline/FlatMapRecTests.scala	100.00% <ø> (ø)
.../main/scala-2.13+/cats/data/NonEmptyLazyList.scala	79.46% <ø> (ø)
core/src/main/scala/cats/Alternative.scala	70.58% <0.00%> (ø)
... and 181 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 6f27f07...b99a854. Read the comment docs.