int arith fixes

Author: Grant Wuerker

Diff for: crates/library2/std/src/num/int/extend.fe

@@ -34,7 +34,7 @@ extern {
 }
 
 pub trait Extend<Out> {
-    fn extend(self) -> Out 
+    fn extend(self) -> Out
 }
 
 impl Extend<u16> for u8 { fn extend(self) -> u16 { u8_u16_extend(self) } }
@@ -66,4 +66,4 @@ impl Extend<i128> for i32 { fn extend(self) -> i128 { i32_i128_extend(self) } }
 impl Extend<i256> for i32 { fn extend(self) -> i256 { i32_i256_extend(self) } }
 impl Extend<i128> for i64 { fn extend(self) -> i128 { i64_i128_extend(self) } }
 impl Extend<i256> for i64 { fn extend(self) -> i256 { i64_i256_extend(self) } }
-impl Extend<i256> for i128 { fn extend(self) -> i256 { i128_i256_extend(self) } }
+impl Extend<i256> for i128 { fn extend(self) -> i256 { i128_i256_extend(self) } }