ini_file: Don't report changed=true when removing if nothing is changed. (#4155) (#4213)

* don't report changed when nothing is removed

* add change log

* linter happy

* Update plugins/modules/files/ini_file.py

Co-authored-by: Felix Fontein <felix@fontein.de>

* Update changelogs/fragments/4154-ini_file_changed.yml

Co-authored-by: Felix Fontein <felix@fontein.de>

* add absent idempotency test

Co-authored-by: Felix Fontein <felix@fontein.de>
(cherry picked from commit f527bb61f9)

Co-authored-by: James Livulpi <james.livulpi@me.com>

changelogs/fragments/4154-ini_file_changed.yml

@@ -0,0 +1,2 @@
+bugfixes:
+  - ini_file - when removing nothing do not report changed (https://github.com/ansible-collections/community.general/issues/4154).

plugins/modules/files/ini_file.py

@@ -367,6 +367,7 @@ def do_ini(module, filename, section=None, option=None, values=None,
                     section_lines = new_section_lines
         else:
             # drop the entire section
+            if section_lines:
                 section_lines = []
                 msg = 'section removed'
                 changed = True

tests/integration/targets/ini_file/tasks/tests/02-values.yml

@@ -504,6 +504,13 @@
     state: absent
   register: result20
 
+- name: test-values 20 - remove section 'drinks' again to ensure idempotency"
+  ini_file:
+    path: "{{ output_file }}"
+    section: drinks
+    state: absent
+  register: result20_remove_again  
+
 - name: test-values 20 - read content from output file
   slurp:
     src: "{{ output_file }}"
@@ -517,6 +524,7 @@
   assert:
     that:
       - result20 is changed
+      - result20_remove_again is not changed
       - result20.msg == 'section removed'
       - content20 == "\n"