Address issues reported by ruff check (#11043)

* Resolve E713 and E714 (not in/is tests).

* Address UP018 (unnecessary str call).

* UP045 requires Python 3.10+.

* Address UP007 (X | Y for type annotations).

* Address UP035 (import Callable from collections.abc).

* Address UP006 (t.Dict -> dict).

* Address UP009 (UTF-8 encoding comment).

* Address UP034 (extraneous parantheses).

* Address SIM910 (dict.get() with None default).

* Address F401 (unused import).

* Address UP020 (use builtin open).

* Address B009 and B010 (getattr/setattr with constant name).

* Address SIM300 (Yoda conditions).

* UP029 isn't in use anyway.

* Address FLY002 (static join).

* Address B034 (re.sub positional args).

* Address B020 (loop variable overrides input).

* Address B017 (assert raise Exception).

* Address SIM211 (if expression with false/true).

* Address SIM113 (enumerate for loop).

* Address UP036 (sys.version_info checks).

* Remove unnecessary UP039.

* Address SIM201 (not ==).

* Address SIM212 (if expr with twisted arms).

* Add changelog fragment.

* Reformat.

plugins/modules/cronvar.py

@@ -171,15 +171,13 @@ class CronVar:
                 raise CronVarError("Unable to read crontab")
 
             lines = out.splitlines()
-            count = 0
-            for l in lines:
+            for count, l in enumerate(lines):
                 if count > 2 or (
                     not re.match(r"# DO NOT EDIT THIS FILE - edit the master and reinstall.", l)
                     and not re.match(r"# \(/tmp/.*installed on.*\)", l)
                     and not re.match(r"# \(.*version.*\)", l)
                 ):
                     self.lines.append(l)
-                count += 1
 
     def log_message(self, message):
         self.module.debug(f'ansible: "{message}"')