Fix [source] links in documentation for decorated functions

docs/Makefile

@@ -3,13 +3,13 @@
 # You can set these variables from the command line.
 SPHINXOPTS    = -j 1 -aT
 SPHINXAUTO    = \
-	-z ../qucumber \
-	-z ../examples \
-	-i *.swp \
-	-i **/.~*.ipynb \
-	-i **/*-checkpoint.ipynb \
-	-r '_examples/*' \
-	-i Makefile
+	--watch '../qucumber' \
+	--watch '../examples' \
+	--ignore '*.swp' \
+	--ignore '**/.~*.ipynb' \
+	--ignore '**/*-checkpoint.ipynb' \
+	--re-ignore '_examples/*' \
+	--ignore Makefile
 SPHINXBUILD   = sphinx-build
 SPHINXPROJ    = QuCumber
 SOURCEDIR     = .

docs/conf.py

@@ -46,11 +46,11 @@
 
 project = "QuCumber"
 author = "PIQuIL"
-copyright = "2018-{}, {}".format(date.today().year, author)
+copyright = f"2018-{date.today().year}, {author}"
 
 
 init_file = {}
-with open("../qucumber/__version__.py", "r") as f:
+with open("../qucumber/__version__.py") as f:
     # The short X.Y.Z version
     exec(f.read(), init_file)
     version = init_file["__version__"]
@@ -341,6 +341,10 @@ def linkcode_resolve(domain, info):
     module = __import__(info["module"], fromlist=[class_name])
     obj = attrgetter(info["fullname"])(module)
 
+    # unwrap decorated functions
+    if hasattr(obj, "__wrapped__"):
+        obj = obj.__wrapped__
+
     try:
         file_name = inspect.getsourcefile(obj)
     except Exception: