message: Replace static `PROMPT` with const `PROMPT`
diff: @@ -31,18 +31,18 @@ use std::sync::Arc;
  // On unix platforms you can use ANSI escape sequences
  #[cfg(unix)]
  -static PROMPT: &'static str = "\x1b[1;32m>>\x1b[0m ";
  +const PROMPT: &'static str = "\x1b[1;32m>>\x1b[0m ";
  // Windows consoles typically don't support ANSI escape sequences out
  // of the box
  #[cfg(windows)]
  -static PROMPT: &'static str = ">> ";
  +const PROMPT: &'static str = ">> ";
  fn main() {
  let mut rl = Editor::<()>::new();
  let mut proj = None;
  loop {
  - let readline = rl.readline(">> ");
  + let readline = rl.readline(PROMPT);
  match readline {
  Ok(line) => {
  let mut terms = line.split_whitespace();
  