Use comment rather than inline code to find filename.

exerciser/src/main.rs

@@ -25,6 +25,8 @@ use std::{
 
 const INCLUDE_START: &str = "{{#include ";
 const INCLUDE_END: &str = "}}";
+const FILENAME_START: &str = "<!-- File ";
+const FILENAME_END: &str = " -->";
 
 fn main() -> anyhow::Result<()> {
     pretty_env_logger::init();
@@ -59,9 +61,15 @@ fn main() -> anyhow::Result<()> {
     for event in parser {
         trace!("{:?}", event);
         match event {
-            Event::Code(x) => {
-                info!("{}:", x);
-                next_filename = Some(x.into_string());
+            Event::Html(html) => {
+                let html = html.trim();
+                if html.starts_with(FILENAME_START) && html.ends_with(FILENAME_END) {
+                    next_filename = Some(
+                        html[FILENAME_START.len()..html.len() - FILENAME_END.len()]
+                            .to_string(),
+                    );
+                    info!("Next file: {:?}:", next_filename);
+                }
             }
             Event::Start(Tag::CodeBlock(x)) => {
                 info!("Start {:?}", x);

src/exercises/bare-metal/compass.md

@@ -25,6 +25,8 @@ following files.
 
 `src/main.rs`:
 
+<!-- File src/main.rs -->
+
 ```rust,compile_fail
 {{#include compass/src/main.rs:top}}
 use microbit::{hal::uarte::{Baudrate, Parity, Uarte}, Board};
@@ -40,18 +42,24 @@ use microbit::{hal::uarte::{Baudrate, Parity, Uarte}, Board};
 
 `Cargo.toml` (you shouldn't need to change this):
 
+<!-- File Cargo.toml -->
+
 ```toml
 {{#include compass/Cargo.toml}}
 ```
 
 `Embed.toml` (you shouldn't need to change this):
 
+<!-- File Embed.toml -->
+
 ```toml
 {{#include compass/Embed.toml}}
 ```
 
 `.cargo/config.toml` (you shouldn't need to change this):
 
+<!-- File .cargo/config.toml -->
+
 ```toml
 {{#include compass/.cargo/config.toml}}
 ```

src/exercises/bare-metal/rtc.md

@@ -8,6 +8,9 @@ Download the [exercise template](../../exercises.zip) and look in the `rtc` dire
 following files.
 
 `src/main.rs`:
+
+<!-- File src/main.rs -->
+
 ```rust,compile_fail
 {{#include rtc/src/main.rs:top}}
 
@@ -21,56 +24,89 @@ following files.
 ```
 
 `src/exceptions.rs` (you shouldn't need to change this):
+
+<!-- File src/exceptions.rs -->
+
 ```rust,compile_fail
 {{#include rtc/src/exceptions.rs}}
 ```
 
 `src/logger.rs` (you shouldn't need to change this):
+
+<!-- File src/logger.rs -->
+
 ```rust,compile_fail
 {{#include rtc/src/logger.rs}}
 ```
 
 `src/pl011.rs` (you shouldn't need to change this):
+
+<!-- File src/pl011.rs -->
+
 ```rust,compile_fail
 {{#include rtc/src/pl011.rs}}
 ```
 
 `Cargo.toml` (you shouldn't need to change this):
+
+<!-- File Cargo.toml -->
+
 ```toml
 {{#include rtc/Cargo.toml}}
 ```
 
 `build.rs` (you shouldn't need to change this):
+
+<!-- File build.rs -->
+
 ```rust,compile_fail
 {{#include rtc/build.rs}}
 ```
 
 `entry.S` (you shouldn't need to change this):
+
+<!-- File entry.S -->
+
 ```armasm
 {{#include rtc/entry.S}}
 ```
 
 `exceptions.S` (you shouldn't need to change this):
+
+<!-- File exceptions.S -->
+
 ```armasm
 {{#include rtc/exceptions.S}}
 ```
 
 `idmap.S` (you shouldn't need to change this):
+
+<!-- File idmap.S -->
+
 ```armasm
 {{#include rtc/idmap.S}}
 ```
 
 `image.ld` (you shouldn't need to change this):
+
+<!-- File image.ld -->
+
 ```ld
 {{#include rtc/image.ld}}
 ```
 
 `Makefile` (you shouldn't need to change this):
+
+<!-- File Makefile -->
+
 ```makefile
 {{#include rtc/Makefile}}
 ```
 
 `.cargo/config.toml` (you shouldn't need to change this):
+
+<!-- File .cargo/config.toml -->
+
 ```toml
 {{#include rtc/.cargo/config.toml}}
 ```