hg: jdk/sandbox: 8236705: Use single character variant of String.replace when applicable

[chris.hegarty at oracle.com]

Changeset: 1b28af1e2804
Author:    igerasim
Date:      2020-01-07 15:33 -0800
URL:       https://hg.openjdk.java.net/jdk/sandbox/rev/1b28af1e2804

8236705: Use single character variant of String.replace when applicable
Reviewed-by: igerasim, alanb
Contributed-by: Christoph Dreis <christoph.dreis at freenet.de>

! src/java.base/share/classes/jdk/internal/module/ModulePath.java
! src/java.base/share/classes/jdk/internal/module/Resources.java