Merge #660

660: Clarify r=AfoHT a=01joja

I made 3 suggested changes

- `.cargo/config` -> `.cargo/config.toml`. Now extensions for vs code recognizes that it is a toml-file.
- Moved a note about how to configure target in cargo.toml to by-example.md from app_init.md.
- changed all occurrences of  `.cargo/config`  to `.cargo/config.toml` in the ru and eng version of the book.


Co-authored-by: Jonas Jacobsson <01joja@gmail.com>

book/en/src/by-example.md

@@ -30,3 +30,9 @@ Yields this output:
 ``` console
 {{#include ../../../ci/expected/locals.run}}
 ```
+
+> **NOTE**: You can choose target device by passing a target
+> triple to cargo (e.g. `cargo run --example init --target thumbv7m-none-eabi`) or
+> configure a default target in `.cargo/config.toml`.
+>
+> For running the examples, we use a Cortex M3 emulated in QEMU, so the target is `thumbv7m-none-eabi`.

book/en/src/by-example/app_init.md

@@ -28,9 +28,3 @@ Running the example will print `init` to the console and then exit the QEMU proc
 $ cargo run --target thumbv7m-none-eabi --example init
 {{#include ../../../../ci/expected/init.run}}
 ```
-
-> **NOTE**: You can choose target device by passing a target
-> triple to cargo (e.g. `cargo run --example init --target thumbv7m-none-eabi`) or
-> configure a default target in `.cargo/config.toml`.
->
-> For running the examples, we use a Cortex M3 emulated in QEMU, so the target is `thumbv7m-none-eabi`.

book/ru/src/by-example/new.md

@@ -78,7 +78,7 @@ $ cargo add panic-semihosting
 5. Соберите его, загрузите в микроконтроллер и запустите.
 
 ``` console
-$ # ПРИМЕЧАНИЕ: Я раскомментировал опцию `runner` в `.cargo/config`
+$ # ПРИМЕЧАНИЕ: Я раскомментировал опцию `runner` в `.cargo/config.toml`
 $ cargo run
 {{#include ../../../../ci/expected/init.run}}
 ```