Fix "record.path" case being normalized for no reason

CHANGELOG.rst

@@ -3,11 +3,12 @@ Unreleased
 
 - Modify behavior of sink option ``backtrace`` so it only extends the stacktrace upward, the display of variables values is now controlled with the new ``diagnose`` argument (`#49 <https://github.com/Delgan/loguru/issues/49>`_)
 - Add coloration of exception traceback even if ``diagnose`` and ``backtrace`` options are ``False``
-- Add a way to limit the depth of formatted exceptions traceback by setting the conventional `sys.tracebacklimit` variable (`#77 <https://github.com/Delgan/loguru/issues/77>`_)
+- Add a way to limit the depth of formatted exceptions traceback by setting the conventional ``sys.tracebacklimit`` variable (`#77 <https://github.com/Delgan/loguru/issues/77>`_)
 - The ``record["exception"]`` attribute is now unpackable as a ``(type, value, traceback)`` tuple
 - Fix exception stack trace not colorizing source code lines on Windows
 - Fix possible ``AttributeError`` while formatting exceptions within a ``celery`` task (`#52 <https://github.com/Delgan/loguru/issues/52>`_)
-- Fix `logger.catch` decorator not working with generator and coroutine functions (`#75 <https://github.com/Delgan/loguru/issues/75>`_)
+- Fix ``logger.catch`` decorator not working with generator and coroutine functions (`#75 <https://github.com/Delgan/loguru/issues/75>`_)
+- Fix ``record.path`` case being normalized for no necessary reason (`#85 <https://github.com/Delgan/loguru/issues/85>`_)
 
 
 0.2.5 (2019-01-20)

loguru/_logger.py

@@ -9,7 +9,7 @@
 from collections import namedtuple
 from inspect import isclass
 from multiprocessing import current_process
-from os.path import basename, normcase, splitext
+from os.path import basename, splitext
 from threading import current_thread
 
 from colorama import AnsiToWin32
@@ -1520,7 +1520,7 @@ def log_function(_self, _message, *args, **kwargs):
                 return
 
             code = frame.f_code
-            file_path = normcase(code.co_filename)
+            file_path = code.co_filename
             file_name = basename(file_path)
             thread = current_thread()
             process = current_process()