fix: keep generic method call leading comments on their own line

[jtkiesel]

What changed with this PR:

Leading comments on generic method invocations are now kept on their own line.

Example

Input

a
  // 1
  .b()
  // 2
  .<C>c();

Output

a
  // 1
  .b()
  // 2
  .<C>c();

Relative issues or prs:

Closes #884