Cosmetics...

httpdecho.py

@@ -62,7 +62,8 @@ def get_message(self):
         message["Method"] = self.command
         message["Path"] = self.path
 
-        server_url = parse.SplitResult("http", f"{self.server.server_name}:{self.server.server_port}", "", "", "")
+        server_url = parse.SplitResult(scheme="http", netloc=f"{self.server.server_name}:{self.server.server_port}",
+                                       path="", query="", fragment="")
         request_url = parse.urlsplit(server_url.geturl() + self.path)
         for name, value in parse.parse_qs(request_url.query).items():
             message.add_header(name, value[0])

tox.ini

@@ -13,9 +13,9 @@ isolated_build = true
 commands =
     check-manifest                              # confirm items checked into vcs are in your sdist
     python setup.py check -m -s                 # confirm required package meta-data in setup.py
-    # stop the build if there are Python syntax errors or undefined names
+# stop the build if there are Python syntax errors or undefined names
     flake8 . --count --select=E9,F63,F7,F82 --show-source --statistics
-    # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
+# exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
     flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
     python -m pytest .
 
@@ -35,5 +35,5 @@ deps =
 
 [flake8]
 select = E,W,F
-max-line-length=127
+max-line-length = 127
 exclude = .tox, *.egg, build, data, .git, .eggs, __pycache__, test/, docs/, build/, dist/, env.py