Keep empty line around comments

[krlmlr]

The empty line above the "defining b" comment should remain.

styler::style_text('
c(
  a = 1,
  
  # defining b
  b = 2
)
')
#> 
#> c(
#>   a = 1,
#>   # defining b
#>   b = 2
#> )

^{Created on 2020-04-12 by the reprex package (v0.3.0)}

Follow-up to #630.

[lorenzwalthert]

It's now implemented for both blank lines above and below comments. Hope that works for you.