warning: this message starts with an uppercase character
  --> $DIR/diag_msg_uppercase_start.rs:21:31
   |
21 |     cx.emit_lint(DUMMY, expr, "X <-- starting with upper case");
   |                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
   |
   = note: `#[warn(marker::marker_lints::diag_msg_uppercase_start)]` on by default

warning: this message starts with an uppercase character
  --> $DIR/diag_msg_uppercase_start.rs:22:31
   |
22 |     cx.emit_lint(DUMMY, expr, "Hey <-- starting with upper case");
   |                               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^

warning: 2 warnings emitted