rust: adapt Cargo key binding to conventions

contrib/lang/rust/README.md

@@ -14,12 +14,32 @@
 
 ## Description
 
-This layer aims to support Rust development in Spacemacs.
+This layer aims to support [Rust][] development in Spacemacs.
+
+For now only basic support for [Cargo][] is provided.
 
 ## Install
 
+### Layer
+
 To use this layer, add it to your `~/.spacemacs`
 
 ```elisp
 (setq-default dotspacemacs-configuration-layers '(rust))
 ```
+
+### Cargo
+
+[Cargo][] is a project management command line tool for Rust.
+Installation instructions can be found on the main page of [Cargo][].
+
+## Key bindings
+
+    Key Binding      |                 Description
+---------------------|------------------------------------------------------------
+<kbd>SPC m c c</kbd> | compile project with Cargo
+<kbd>SPC m c x</kbd> | compile and execute project with Cargo
+<kbd>SPC m t a</kbd> | execute all tests with Cargo
+
+[Rust]: http://www.rust-lang.org/
+[Cargo]: http://doc.crates.io/index.html

contrib/lang/rust/packages.el

@@ -41,9 +41,9 @@ which require an initialization must be listed explicitly in the list.")
 
       ;; (spacemacs/declare-prefix-for-mode 'rust-mode "mc" "cargo")
       (evil-leader/set-key-for-mode 'rust-mode
-        "mcb" 'spacemacs/rust-cargo-build
-        "mcr" 'spacemacs/rust-cargo-run
-        "mct" 'spacemacs/rust-cargo-test)))
+        "mcc" 'spacemacs/rust-cargo-build
+        "mcC" 'spacemacs/rust-cargo-run
+        "mta" 'spacemacs/rust-cargo-test)))
   "Initialize rust-mode"
   )