fix(docs): readme was getting cut off during generation

Fixes: https://github.com/zkat/miette/issues/174

README.md

@@ -383,6 +383,229 @@ pub struct MyErrorType {
 ##### ... help text
 `miette` provides two facilities for supplying help text for your errors:
 
+The first is the `#[help()]` format attribute that applies to structs or
+enum variants:
+
+```rust
+use miette::Diagnostic;
+use thiserror::Error;
+
+#[derive(Debug, Diagnostic, Error)]
+#[error("welp")]
+#[diagnostic(help("try doing this instead"))]
+struct Foo;
+```
+
+The other is by programmatically supplying the help text as a field to
+your diagnostic:
+
+```rust
+use miette::Diagnostic;
+use thiserror::Error;
+
+#[derive(Debug, Diagnostic, Error)]
+#[error("welp")]
+#[diagnostic()]
+struct Foo {
+    #[help]
+    advice: Option<String>, // Can also just be `String`
+}
+
+let err = Foo {
+    advice: Some("try doing this instead".to_string()),
+};
+```
+
+#### ... multiple related errors
+
+`miette` supports collecting multiple errors into a single diagnostic, and
+printing them all together nicely.
+
+To do so, use the `#[related]` tag on any `IntoIter` field in your
+`Diagnostic` type:
+
+```rust
+use miette::Diagnostic;
+use thiserror::Error;
+
+#[derive(Debug, Error, Diagnostic)]
+#[error("oops")]
+struct MyError {
+    #[related]
+    others: Vec<MyError>,
+}
+```
+
+#### ... delayed source code
+
+Sometimes it makes sense to add source code to the error message later.
+One option is to use [`with_source_code()`](Report::with_source_code)
+method for that:
+
+```rust
+use miette::{Diagnostic, SourceSpan};
+use thiserror::Error;
+
+#[derive(Diagnostic, Debug, Error)]
+#[error("oops")]
+#[diagnostic()]
+pub struct MyErrorType {
+    // Note: label but no source code
+    #[label]
+    err_span: SourceSpan,
+}
+
+fn do_something() -> miette::Result<()> {
+    // This function emits actual error with label
+    return Err(MyErrorType {
+        err_span: (7..11).into(),
+    })?;
+}
+
+fn main() -> miette::Result<()> {
+    do_something().map_err(|error| {
+        // And this code provides the source code for inner error
+        error.with_source_code(String::from("source code"))
+    })
+}
+```
+
+Also source code can be provided by a wrapper type. This is especially
+useful in combination with `related`, when multiple errors should be
+emitted at the same time:
+
+```rust
+use miette::{Diagnostic, Report, SourceSpan};
+use thiserror::Error;
+
+#[derive(Diagnostic, Debug, Error)]
+#[error("oops")]
+#[diagnostic()]
+pub struct InnerError {
+    // Note: label but no source code
+    #[label]
+    err_span: SourceSpan,
+}
+
+#[derive(Diagnostic, Debug, Error)]
+#[error("oops: multiple errors")]
+#[diagnostic()]
+pub struct MultiError {
+    // Note source code by no labels
+    #[source_code]
+    source_code: String,
+    // The source code above is used for these errors
+    #[related]
+    related: Vec<InnerError>,
+}
+
+fn do_something() -> Result<(), Vec<InnerError>> {
+    Err(vec![
+        InnerError {
+            err_span: (0..6).into(),
+        },
+        InnerError {
+            err_span: (7..11).into(),
+        },
+    ])
+}
+
+fn main() -> miette::Result<()> {
+    do_something().map_err(|err_list| MultiError {
+        source_code: "source code".into(),
+        related: err_list,
+    })?;
+    Ok(())
+}
+```
+
+#### ... Diagnostic-based error sources.
+
+When one uses the `#[source]` attribute on a field, that usually comes
+from `thiserror`, and implements a method for
+[`std::error::Error::source`]. This works in many cases, but it's lossy:
+if the source of the diagnostic is a diagnostic itself, the source will
+simply be treated as an `std::error::Error`.
+
+While this has no effect on the existing _reporters_, since they don't use
+that information right now, APIs who might want this information will have
+no access to it.
+
+If it's important for you for this information to be available to users,
+you can use `#[diagnostic_source]` alongside `#[source]`. Not that you
+will likely want to use _both_:
+
+```rust
+use miette::Diagnostic;
+use thiserror::Error;
+
+#[derive(Debug, Diagnostic, Error)]
+#[error("MyError")]
+struct MyError {
+    #[source]
+    #[diagnostic_source]
+    the_cause: OtherError,
+}
+
+#[derive(Debug, Diagnostic, Error)]
+#[error("OtherError")]
+struct OtherError;
+```
+
+#### ... handler options
+
+[`MietteHandler`] is the default handler, and is very customizable. In
+most cases, you can simply use [`MietteHandlerOpts`] to tweak its behavior
+instead of falling back to your own custom handler.
+
+Usage is like so:
+
+```rust
+miette::set_hook(Box::new(|_| {
+    Box::new(
+        miette::MietteHandlerOpts::new()
+            .terminal_links(true)
+            .unicode(false)
+            .context_lines(3)
+            .tab_width(4)
+            .build(),
+    )
+}))
+
+```
+
+See the docs for [`MietteHandlerOpts`] for more details on what you can
+customize!
+
+### Acknowledgements
+
+`miette` was not developed in a void. It owes enormous credit to various
+other projects and their authors:
+
+- [`anyhow`](http://crates.io/crates/anyhow) and
+  [`color-eyre`](https://crates.io/crates/color-eyre): these two
+  enormously influential error handling libraries have pushed forward the
+  experience of application-level error handling and error reporting.
+  `miette`'s `Report` type is an attempt at a very very rough version of
+  their `Report` types.
+- [`thiserror`](https://crates.io/crates/thiserror) for setting the
+  standard for library-level error definitions, and for being the
+  inspiration behind `miette`'s derive macro.
+- `rustc` and [@estebank](https://github.com/estebank) for their
+  state-of-the-art work in compiler diagnostics.
+- [`ariadne`](https://crates.io/crates/ariadne) for pushing forward how
+  _pretty_ these diagnostics can really look!
+
+### License
+
+`miette` is released to the Rust community under the [Apache license
+2.0](./LICENSE).
+
+It also includes code taken from [`eyre`](https://github.com/yaahc/eyre),
+and some from [`thiserror`](https://github.com/dtolnay/thiserror), also
+under the Apache License. Some code is taken from
+[`ariadne`](https://github.com/zesterer/ariadne), which is MIT licensed.
+
 [`miette!`]: https://docs.rs/miette/latest/miette/macro.miette.html
 [`std::error::Error`]: https://doc.rust-lang.org/nightly/std/error/trait.Error.html
 [`Diagnostic`]: https://docs.rs/miette/latest/miette/struct.Diagnostic.html

src/lib.rs

@@ -381,7 +381,7 @@
 //!
 //! #### ... help text
 //! `miette` provides two facilities for supplying help text for your errors:
-//
+//!
 //! The first is the `#[help()]` format attribute that applies to structs or
 //! enum variants:
 //!