fix included examples and markdown(book) (#912)

* fix included examples and markdown(book)

fixes: #911

* fix footnote pre_init

* more example link updates

* Restore pool example name

* Example: pool: Upgrade to heapless v0.8

* Example: pool: thumbv6 unsupported: wild cfg-if

Experiment with multi-backend example contained in the example

* Example: lm3s6965: Updated cargo.lock

* Book: Use cargo xtask for by-example

* Docs: Contributing: cargo xtask

---------

Co-authored-by: Henrik Tjäder <henrik@tjaders.com>

1 files changed, 10 insertions, 9 deletions

diff --git a/book/en/src/by-example/app_init.md b/book/en/src/by-example/app_init.md
index 52d657a..49f0bc3 100644
--- a/book/en/src/by-example/app_init.md
+++ b/book/en/src/by-example/app_init.md
@@ -3,13 +3,14 @@
 An RTIC application requires an `init` task setting up the system. The corresponding `init` function must have the
 signature `fn(init::Context) -> (Shared, Local)`, where `Shared` and `Local` are resource structures defined by the user.
 
-The `init` task executes after system reset, [after an optionally defined `pre-init` code section][pre-init] and an always occurring internal RTIC initialization.
-[pre-init]: https://docs.rs/cortex-m-rt/latest/cortex_m_rt/attr.pre_init.html
+The `init` task executes after system reset, [after an optionally defined `pre-init` code section][^pre-init] and an always occurring internal RTIC initialization.
 
-The `init` and optional `pre-init` tasks runs *with interrupts disabled* and have exclusive access to Cortex-M (the `bare_metal::CriticalSection` token is available as `cs`).
+The `init` and optional `pre-init` tasks runs _with interrupts disabled_ and have exclusive access to Cortex-M (the `bare_metal::CriticalSection` token is available as `cs`).
 
 Device specific peripherals are available through the `core` and `device` fields of `init::Context`.
 
+[^pre-init]: [https://docs.rs/cortex-m-rt/latest/cortex_m_rt/attr.pre_init.html](https://docs.rs/cortex-m-rt/latest/cortex_m_rt/attr.pre_init.html)
+
 ## Example
 
 The example below shows the types of the `core`, `device` and `cs` fields, and showcases the use of a `local` variable with `'static` lifetime. Such variables can be delegated from the `init` task to other tasks of the RTIC application.
@@ -17,16 +18,16 @@ The example below shows the types of the `core`, `device` and `cs` fields, and s
 The `device` field is only available when the `peripherals` argument is set to the default value `true`.
 In the rare case you want to implement an ultra-slim application you can explicitly set `peripherals` to `false`.
 
-``` rust,noplayground
-{{#include ../../../../rtic/examples/init.rs}}
+```rust,noplayground
+{{#include ../../../../examples/lm3s6965/examples/init.rs}}
 ```
 
 Running the example will print `init` to the console and then exit the QEMU process.
 
-``` console
-$ cargo run --target thumbv7m-none-eabi --example init
+```console
+$ cargo xtask qemu --verbose --example init
 ```
 
-``` console
-{{#include ../../../../rtic/ci/expected/init.run}}
+```console
+{{#include ../../../../ci/expected/lm3s6965/init.run}}
 ```