Address review comments.

Author: emilio

libbindgen/src/clang.rs

@@ -1278,7 +1278,7 @@ impl EvalResult {
     /// Create a dummy EvalResult.
     pub fn new(_: Cursor) -> Self {
         EvalResult {
-            x: ::std::ptr::null_mut(),
+            x: ptr::null_mut(),
         }
     }
 

libbindgen/src/ir/ty.rs

@@ -123,7 +123,7 @@ impl Type {
         Self::new(Some(name), None, kind, false)
     }
 
-    /// Is this an floating point type?
+    /// Is this a floating point type?
     pub fn is_float(&self) -> bool {
         match self.kind {
             TypeKind::Float(..) => true,