List indent fixing is broken

[Cougar]

1️⃣ Description

I have "valid" YAML file with not the best list indents and yamlfixer breaks it

📑 Steps to Reproduce

Steps to reproduce the behavior:

1. When I have test.yml like this:

---

a:
  b:
  - 1
  - 2
  - 3
  c:
    4

2. Then run that: yamlfixer --nochange --summary --diffto my.patch test.yml

3. I get such change:

--- "test.yml"
+++ "test.yml-after"
@@ -2,7 +2,7 @@
 
 a:
   b:
-  - 1
+    - 1
   - 2
   - 3
   c:

2️⃣ Expected behavior

All lines with elements 1, 2 and 3 should be indented with two extra spaces like this:

---

a:
  b:
    - 1
    - 2
    - 3
  c:
    4

Diff should look like this:

--- "test.yml"
+++ "test.yml-after"
@@ -2,8 +2,8 @@
 
 a:
   b:
-  - 1
-  - 2
-  - 3
+    - 1
+    - 2
+    - 3
   c:
     4

# ℹ️ Environment details

 - OS: `openSUSE Leap 15.4`
 - Python runtime: `3.10.10`
 - The output of `yamlfixer --version`: `yamlfixer v0.9.15`
 - Used shell: bash
 
# Additional context

Add any other context about the problem here.

[Cougar]

Related with adrienverge/yamllint#427

[cyyeong]

This is still an issue. Will this be fixed?

[sawntoe]

I have attempted a naive fix in #223