Use ruff for trailing whitespace.

misc/coding_tools/find-trailing-spaces.py

@@ -1,44 +0,0 @@
-#!/usr/bin/env python
-
-from __future__ import print_function
-
-import os, sys
-
-from twisted.python import usage
-
-class Options(usage.Options):
-    optFlags = [
-        ("recursive", "r", "Search for .py files recursively"),
-        ]
-    def parseArgs(self, *starting_points):
-        self.starting_points = starting_points
-
-found = [False]
-
-def check(fn):
-    f = open(fn, "r")
-    for i,line in enumerate(f.readlines()):
-        if line == "\n":
-            continue
-        if line[-1] == "\n":
-            line = line[:-1]
-        if line.rstrip() != line:
-            # the %s:%d:%d: lets emacs' compile-mode jump to those locations
-            print("%s:%d:%d: trailing whitespace" % (fn, i+1, len(line)+1))
-            found[0] = True
-    f.close()
-
-o = Options()
-o.parseOptions()
-if o['recursive']:
-    for starting_point in o.starting_points:
-        for root, dirs, files in os.walk(starting_point):
-            for fn in [f for f in files if f.endswith(".py")]:
-                fn = os.path.join(root, fn)
-                check(fn)
-else:
-    for fn in o.starting_points:
-        check(fn)
-if found[0]:
-    sys.exit(1)
-sys.exit(0)

tox.ini

@@ -111,11 +111,11 @@ commands =
          flake8 {posargs:{env:DEFAULT_FILES}}
          python misc/coding_tools/check-umids.py {posargs:{env:DEFAULT_FILES}}
          python misc/coding_tools/check-debugging.py {posargs:{env:DEFAULT_FILES}}
-         python misc/coding_tools/find-trailing-spaces.py -r {posargs:{env:DEFAULT_FILES}}
          # B023: Find loop variables that aren't bound in a loop, equivalent of pylint
          #       cell-var-from-loop.
+         # W291,W293: Trailing whitespace.
          # ruff could probably replace flake8 and perhaps above tools as well...
-         ruff check --select=B023 {posargs:{env:DEFAULT_FILES}}
+         ruff check --select=B023,W291,W293 {posargs:{env:DEFAULT_FILES}}
 
          # If towncrier.check fails, you forgot to add a towncrier news
          # fragment explaining the change in this branch.  Create one at