expandPathInternal Windows compatibility

[ahorek]

MRI: File.realpath 'c:/test' => 'c:/test'
jRuby: File.realpath 'c:/test' => 'C:\ \test' (tested on 1.7.19 and 9.0.0.0 rc2)

It causes problems in Rails applications, because Rails.root path is invalid.

jruby/core/src/main/java/org/jruby/RubyFile.java

Line 1592 in da5dad6

// if (IS_WINDOWS) {

[headius]

You might test 1.7.21 but I don't expect it to be fixed there.

[ahorek]

• 1.7.21 same result

[ahorek]

https://github.com/jruby/jruby/blob/master/core/src/main/java/org/jruby/RubyFile.java#L1632

=> realPath = JRubyFile.normalizeSeps(new File(realPath).getCanonicalPath());