1 files changed, 5 insertions, 3 deletions
diff --git a/Lib/urllib/request.py b/Lib/urllib/request.py
index 9e55543..1fcaa89 100644
--- a/Lib/urllib/request.py
+++ b/Lib/urllib/request.py
@@ -1667,9 +1667,11 @@ else:
     def pathname2url(pathname):
         """OS-specific conversion from a file system path to a relative URL
         of the 'file' scheme; not recommended for general use."""
-        if pathname[:2] == '//':
-            # Add explicitly empty authority to avoid interpreting the path
-            # as authority.
+        if pathname[:1] == '/':
+            # Add explicitly empty authority to absolute path. If the path
+            # starts with exactly one slash then this change is mostly
+            # cosmetic, but if it begins with two or more slashes then this
+            # avoids interpreting the path as a URL authority.
             pathname = '//' + pathname
         encoding = sys.getfilesystemencoding()
         errors = sys.getfilesystemencodeerrors()