class SimpleCov::SourceFile::Branch

(see the nested_branches fixture)
* makes it distinguishable if the first line of the branch is an inline branch
* highlights the condition
at if/else) because that
Usually we choose the line above the start of the branch (so that it shows up

The line on which we want to report the coverage

def report_line
  if inline?
    start_line
  else
    start_line - 1
  end
end