Merge rust-bitcoin#118: fix(types): fix NumericError message causing test failures

3c55303 fix(types): fix NumericError message causing test failures (nervana21)

Pull request description:

  Removes extra space in NumericError::Overflow's error message that was causing test failures.

ACKs for top commit:
  tcharding:
    ACK 3c55303

Tree-SHA512: e9149b7c4776942807e5e14a07a07d2a28c57ecefcb369db961562f5707ab6460fd4a3d6c2eb74638626415aa2b157973677a0ce3f44ba40395d59070aef000b

Author: tcharding

types/src/lib.rs

@@ -73,7 +73,7 @@ impl fmt::Display for NumericError {
 
         match *self {
             Negative{ ref field, value } => write!(f, "expected an unsigned numeric value however the value was negative (field name: {} value: {})", field, value),
-            Overflow { ref field, value } => write!(f, "a  value larger than `u32::MAX` was unexpectedly encountered (field name: {} Value: {})", field, value),
+            Overflow { ref field, value } => write!(f, "a value larger than `u32::MAX` was unexpectedly encountered (field name: {} Value: {})", field, value),
         }
     }
 }