Remove misc whitespace

Author: ChallengeDev210

CHANGELOG.md

@@ -13,7 +13,7 @@
 
 The previous release changed the behavior of `Display` for `ChildNumber`, assuming that any correct usage would not be
 affected. [Issue 608](https://github.com/rust-bitcoin/rust-bitcoin/issues/608) goes into the details of why this isn't
-the case and how we broke both `rust-miniscript` and BDK. 
+the case and how we broke both `rust-miniscript` and BDK.
 
 # 0.26.1 - 2021-06-06 (yanked, see explanation above)