Fix things

assets/dash-3d-implementation/undefined-behaviour-it.rs

@@ -1,10 +1,8 @@
-fn func() {
-    let mut vec = vec![1, 2, 3];
-    let iter = vec.iter();
-    loop {
-        match iter.next() {
-            Some(x) => vec.push(x),
-            None => break,
-        }
+let mut vec = vec![1, 2, 3];
+let iter = vec.iter();
+loop {
+    match iter.next() {
+        Some(x) => vec.push(x),
+        None => break,
     }
 }

assets/dash-3d-implementation/undefined-behaviour.rs

@@ -1,6 +1,4 @@
-fn func() {
-    let mut vec = vec![1, 2, 3];
-    for value in &vec {
-        vec.push(value);
-    }
+let mut vec = vec![1, 2, 3];
+for value in &vec {
+    vec.push(value);
 }

src/dash-3d-implementation/introduction.tex

@@ -33,7 +33,7 @@ Consider the piece of C++ code in Listings~\ref{d3i:undefined-behaviour-cpp} and
 
 \begin{figure}[ht]
     \centering
-    \begin{minipage}[c]{0.75\textwidth}
+    \begin{minipage}[c]{0.85\textwidth}
         \lstinputlisting[
             language=c++,
             label={d3i:undefined-behaviour-cpp},