Use single character replace variant in Resources.toPackageName(String)

[Alan Bateman]

On 07/01/2020 07:09, Ivan Gerasimov wrote:
> So, I filed a Jira bug:
>
> BUGURL: https://bugs.openjdk.java.net/browse/JDK-8236705
> WEBREV: http://cr.openjdk.java.net/~igerasim/8236705/00/webrev/
>
I added these source files in JDK 9, it was just an oversight that I 
didn't use the single char replace. My guess is that the change 
ModulePath deriveModuleDescriptor won't be noticeable in any real 
benchmark. This method is deriving a module descriptor for a legacy JAR 
file on the module path so it's scanning the contents of the JAR file 
and all attributes in its main manifest. The Resources toPackageName 
method is used more widely so it may help in a few cases. Anyway, this 
change looks fine except the copyright year (you've changed it to 2019 
rather than 2020).

-Alan