message: style: simplify if statement
  Closes
diff: @@ -691,9 +691,7 @@ impl<'c> ExecNoSync<'c> {
  }
  AnchoredStart => {
  let lits = &self.ro.nfa.prefixes;
  - if !self.ro.nfa.is_anchored_start
  - || (self.ro.nfa.is_anchored_start && start == 0)
  - {
  + if start == 0 || !self.ro.nfa.is_anchored_start {
  lits.find_start(&text[start..])
  .map(|(s, e)| (start + s, start + e))
  } else {
  