lib.Uri: Treat paths starting with "~" specially

An Uri instance constructed from "~/some/path" returns
"file://~/some/path" as the .full property, i.e. with the "~" in the
authority part. That's not accurate and doesn't make the intended
sense in an URL context, see RFC 8089:

  Common UNIX shells such as the Bourne-Again SHell (bash) and Z
  SHell (zsh) provide a function known as "tilde expansion"
  [Bash-Tilde] or "filename expansion" [Zsh-Tilde], where a path
  that begins with a tilde character "~" can be expanded out to a
  special directory name.  No such facility exists using the file
  URI scheme; a tilde in a file URI is always just a tilde.

The "fix" introduced by this commit makes .full return the path
without file:// prepended. That's conservative. It could also chose
to expand the tilde, which is arguably cleaner. To be introduced by a
later change after this commit has seen more coverage.

Signed-off-by: Jan Lindemann <jan@janware.com>

src/python/jw/pkg/lib/Uri.py

@@ -17,6 +17,8 @@ class Uri:
         self, scheme: bool, credentials: bool, secure: bool, path: bool
     ) -> str:
         ret = ''
+        if self.__p.path.startswith('~'):
+            return self.path
         if scheme:
             ret += f'{self.protocol}://'
         if credentials and self.username:
@@ -62,7 +64,7 @@ class Uri:
     @cached_property
     def scheme(self) -> str:
         ret = self.__p.scheme
-        if not ret:
+        if not ret and not self.__p.path.startswith('~'):
             return 'file'
         return ret