Update release-notes.md

Author: Ben Hillis

WSL/release-notes.md

@@ -19,7 +19,7 @@ For general Windows information on build 17692 visit the [Windows Blog](https://
 * Fix issue with the WSL shell context menu entries that do not correctly handle paths with spaces.
 * Expose per-directory case sensitivity as an extended attribute
 * ARM64: Emulate cache maintenance operations. Resolve [dotnet issue](https://github.com/dotnet/core/issues/1561).
-* DrvFs: only unescape characters in the private range that correspond to an escaped
+* DrvFs: only unescape characters in the private range that correspond to an escaped character.
 
 ## Build 17686
 For general Windows information on build 17686 visit the [Windows Blog](https://blogs.windows.com/windowsexperience/2018/06/06/announcing-windows-10-insider-preview-build-17686).