message: Sorted missing function bodies on unused generic functions
  Issue happened because span to string actual gave you "filename line:col - line:col" I wanted span_to_snippet.
diff: @@ -222,7 +222,12 @@ impl<'a> CoverageVisitor<'a> {
  fn cover_lines(&mut self, span: Span) {
  if let Ok(ls) = self.codemap.span_to_lines(span) {
  - let temp_string = self.codemap.span_to_string(span);
  + let temp_string = if let Ok(s) = self.codemap.span_to_snippet(span) {
  + s
  + } else {
  + // First line is always declaration so this is fine.
  + "fn".to_string()
  + };
  let txt = temp_string.lines();
  let mut is_comment = false;
  lazy_static! {
  