[rust] Ran rustfmt against library code (#5389)

rust/flatbuffers/src/vtable.rs

@@ -34,10 +34,7 @@ impl<'a> PartialEq for VTable<'a> {
 
 impl<'a> VTable<'a> {
     pub fn init(buf: &'a [u8], loc: usize) -> Self {
-        VTable {
-            buf: buf,
-            loc: loc,
-        }
+        VTable { buf: buf, loc: loc }
     }
     pub fn num_fields(&self) -> usize {
         (self.num_bytes() / SIZE_VOFFSET) - 2
@@ -72,7 +69,6 @@ impl<'a> VTable<'a> {
     }
 }
 
-
 #[allow(dead_code)]
 pub fn field_index_to_field_offset(field_id: VOffsetT) -> VOffsetT {
     // Should correspond to what end_table() below builds up.