warning: unresolved link to `3`
  --> $DIR/broken-link-in-unused-doc-string.rs:14:6
   |
LL | /// [3]
   |      ^ no item named `3` in scope
   |
   = help: to escape `[` and `]` characters, add '\' before them like `\[` or `\]`
   = note: `#[warn(rustdoc::broken_intra_doc_links)]` on by default

warning: unresolved link to `1`
  --> $DIR/broken-link-in-unused-doc-string.rs:6:6
   |
LL | /// [1]
   |      ^ no item named `1` in scope
   |
   = help: to escape `[` and `]` characters, add '\' before them like `\[` or `\]`

warning: unresolved link to `1`
  --> $DIR/broken-link-in-unused-doc-string.rs:6:6
   |
LL | /// [1]
   |      ^ no item named `1` in scope
   |
   = help: to escape `[` and `]` characters, add '\' before them like `\[` or `\]`

warning: 3 warnings emitted