Added spaces between curly braces.

Author: ambaxter

book/src/using-bitfields.md

@@ -19,15 +19,15 @@ void print_bitfield(bitfield bfield)
 Bindgen creates a set of field getters and setters for interacting with the bitset. For example, 
 
 ```rust
-    let mut bfield = unsafe{create_bitfield()};
+    let mut bfield = unsafe{ create_bitfield() };
     
     bfield.set_a(1);
     println!("a set to {}", bfield.a());
     bfield.set_b(1);
     println!("b set to {}", bfield.b());
     bfield.set_c(3);
     println!("c set to {}", bfield.c());
-    unsafe{print_bitfield(bfield)};
+    unsafe{ print_bitfield(bfield) };
 ```
 
 will print out
@@ -42,12 +42,12 @@ bitfield: a:1, b:1, c:3
 Overflowing a bitfield will result in the same behavior as in C/C++: the bitfield will be set to 0.
 
 ```rust
-    let mut bfield = unsafe{create_bitfield()};
+    let mut bfield = unsafe{ create_bitfield() };
     bfield.set_a(1);
     bfield.set_b(1);
     bfield.set_c(12);
     println!("c set to {} due to overflow", bfield.c());
-    unsafe{print_bitfield(bfield)};
+    unsafe{ print_bitfield(bfield) };
 ```
 
 will print out
@@ -60,10 +60,10 @@ bitfield: a:1, b:1, c:0
 To create a new bitfield in Rust, use mem::zeroed.
 
 ```rust
-    let mut bfield = unsafe {mem::zeroed::<bitfield>()};
+    let mut bfield = unsafe { mem::zeroed::<bitfield>() };
     bfield.set_a(1);
     bfield.set_c(2);
-    unsafe{print_bitfield(bfield)};
+    unsafe{ print_bitfield(bfield) };
 ```
 
 This will print out
@@ -112,24 +112,24 @@ void walk_bitfield() {
 
 ```rust
 fn walk_bitfield() {
-    let mut bfield = unsafe {mem::zeroed::<bitfield>()};
-    unsafe{print_bitfield(bfield)};
+    let mut bfield = unsafe { mem::zeroed::<bitfield>() };
+    unsafe{ print_bitfield(bfield) };
     bfield.set_c(1);
-    unsafe{print_bitfield(bfield)};
+    unsafe{ print_bitfield(bfield) };
     bfield.set_c(2);
-    unsafe{print_bitfield(bfield)};
+    unsafe{ print_bitfield(bfield) };
     bfield.set_c(3);
-    unsafe{print_bitfield(bfield)};
+    unsafe{ print_bitfield(bfield) };
     bfield.set_c(4);
-    unsafe{print_bitfield(bfield)};
+    unsafe{ print_bitfield(bfield) };
     bfield.set_c(-1);
-    unsafe{print_bitfield(bfield)};
+    unsafe{ print_bitfield(bfield) };
     bfield.set_c(-2);
-    unsafe{print_bitfield(bfield)};
+    unsafe{ print_bitfield(bfield) };
     bfield.set_c(-3);
-    unsafe{print_bitfield(bfield)};
+    unsafe{ print_bitfield(bfield) };
     bfield.set_c(-4);
-    unsafe{print_bitfield(bfield)};
+    unsafe{ print_bitfield(bfield) };
 }
 ```
 
@@ -162,7 +162,7 @@ However, Bindgen's getter provides different results:
 
 ```rust
 fn getter_walk_bitfield() {
-    let mut bfield = unsafe {mem::zeroed::<bitfield>()};
+    let mut bfield = unsafe { mem::zeroed::<bitfield>() };
     println!("c set to {}", bfield.c());
     bfield.set_c(1);
     println!("c set to {}", bfield.c());