$ cargo build
   Compiling minigrep v0.1.0 (file:///projects/minigrep)
error[E0106]: missing lifetime specifier
  --> src/lib.rs:28:51
   |
28 | pub fn search(query: &str, contents: &str) -> Vec<&str> {
   |                                                   ^ expected lifetime parameter
   |
   = help: this function's return type contains a borrowed value, but the signature does not say whether it is borrowed from `query` or `contents`

error: aborting due to previous error

For more information about this error, try `rustc --explain E0106`.
error: could not compile `minigrep`.

To learn more, run the command again with --verbose.
