Ensure heuristic_log_sanitize returns correct data if no password found (#75570)

* Ensure heuristic_log_sanitize returns correct data if no password found. See #75542

* Need to allow code to flow through

changelogs/fragments/heuristic_log_sanitize--missing-pass.yml

@@ -0,0 +1,3 @@
+bugfixes:
+- >
+  ``heuristic_log_sanitize`` - Return the full string if there is no password (https://github.com/ansible/ansible/issues/75542)

lib/ansible/module_utils/basic.py

@@ -350,7 +350,7 @@ def heuristic_log_sanitize(data, no_log_values=None):
                 if begin == 0:
                     # Searched the whole string so there's no password
                     # here.  Return the remaining data
-                    output.insert(0, data[0:begin])
+                    output.insert(0, data[0:prev_begin])
                     break
                 # Search for a different beginning of the password field.
                 sep_search_end = begin

test/units/module_utils/basic/test_heuristic_log_sanitize.py

@@ -87,3 +87,6 @@ class TestHeuristicLogSanitize(unittest.TestCase):
     def test_hides_parameter_secrets(self):
         output = heuristic_log_sanitize('token="secret", user="person", token_entry="test=secret"', frozenset(['secret']))
         self.assertNotIn('secret', output)
+
+    def test_no_password(self):
+        self.assertEqual(heuristic_log_sanitize('foo@bar'), 'foo@bar')