No line-break before `|`and `&` should be allowed

[lorenzwalthert]

Or, if allowed, it should have indention.

styler::style_text(
  'x[a ==3
   | b == v,]'
)
#> x[a == 3
#> | b == v, ]

^{Created on 2019-11-15 by the reprex package (v0.3.0)}

Note this does not happen when a | expression is top-level. The same with &.