Enhancments for functional style in NewlinesRule

[petertrr]

It actually even isn't compliant with our current code style: we are forcing a line break after it, but I thought it looks too ugly. I'll add an issue about making this rule prettier and maybe taking into account text length.

Originally posted by @petertrr in #485 (comment)

[petertrr]

fun foo() {
foo.map()
.bar().foo()
}

=>

fun foo() {
foo.map()
.bar()
.foo()
}

========

fun foo() {
foo
.map()
.bar().foo()
}

=>

fun foo() {
foo
.map()
.bar()
.foo()
}

=================

fun foo() {
foo
.map().bar().foo()
}

=>

fun foo() {
foo
.map()
.bar()
.foo()
}

=======================

fun foo() {
foo
.map()
.bar()
.foo()
}

=>

fun foo() {
foo
.map()
.bar()
.foo()
}

==================

fun foo() {
foo.map().bar().foo()
}

=>

fun foo() {
foo.map()
.bar()
.foo()
}

========================

extendedIndentBeforeDot = false (by the defaut)

safe access (?.) - same as dot

but !! - needs line break

fun foo() {
foo!!.map()
.bar()
.foo()
}

=>

fun foo() {
foo!!
.map()
.bar()
.foo()
}