function ring.util.response/file-response doesn't work with opt. :root like "C:\\" in Windows

[dima0905]

I try to resolve and foundout that .getCanonicalPath has strange behavior:
useful-stuff.multitool> (.getCanonicalPath (File. "c:"))
"C:\Users\Intel"
useful-stuff.multitool> (.getCanonicalPath (File. "c:/"))
"C:\"
useful-stuff.multitool> (.getCanonicalPath (File. "c:\"))
"C:\"