Typo

A space is needed before the exclamation mark in French (see [wikipedia](https://en.wikipedia.org/wiki/Exclamation_mark#French)).

Author: eliovir

_includes/example.rs.html

@@ -8,7 +8,7 @@
         <span class='kw'>match</span> num {
             0 =>  <span class='prelude-val'>println!</span>(<span class='string'>"This code is editable and runnable!"</span>),
             1 =>  <span class='prelude-val'>println!</span>(<span class='string'>"Este código es editable y ejecutable!"</span>),
-            2 =>  <span class='prelude-val'>println!</span>(<span class='string'>"Ce code est modifiable et exécutable!"</span>),
+            2 =>  <span class='prelude-val'>println!</span>(<span class='string'>"Ce code est modifiable et exécutable !"</span>),
             3 =>  <span class='prelude-val'>println!</span>(<span class='string'>"このコードは編集して実行出来ます！"</span>),
             4 =>  <span class='prelude-val'>println!</span>(<span class='string'>"这段代码是可以编辑并且能够运行的！"</span>),
             _ =>  {},