Use SPECIAL_PATH_SEGMENT when encoding path in from_file_path (#902)

* Use SPECIAL_PATH_SEGMENT when encoding path in from_file_path

Fixes #901

* cargo fmt

url/src/lib.rs

@@ -146,7 +146,9 @@ pub use form_urlencoded;
 extern crate serde;
 
 use crate::host::HostInternal;
-use crate::parser::{to_u32, Context, Parser, SchemeType, PATH_SEGMENT, USERINFO};
+use crate::parser::{
+    to_u32, Context, Parser, SchemeType, PATH_SEGMENT, SPECIAL_PATH_SEGMENT, USERINFO,
+};
 use percent_encoding::{percent_decode, percent_encode, utf8_percent_encode};
 use std::borrow::Borrow;
 use std::cmp;
@@ -2817,7 +2819,7 @@ fn path_to_file_url_segments(
         serialization.push('/');
         serialization.extend(percent_encode(
             component.as_os_str().as_bytes(),
-            PATH_SEGMENT,
+            SPECIAL_PATH_SEGMENT,
         ));
     }
     if empty {

url/tests/unit.rs

@@ -146,6 +146,7 @@ fn new_file_paths() {
         assert_from_file_path!("/foo/bar");
         assert_from_file_path!("/foo/ba\0r", "/foo/ba%00r");
         assert_from_file_path!("/foo/ba%00r", "/foo/ba%2500r");
+        assert_from_file_path!("/foo/ba\\r", "/foo/ba%5Cr");
     }
 }