`indentexpr` breaks `gq` bulleted list formatting for `liquid.markdown`

[agude]

The indent/liquid.vim script sets indentexpr=GetLiquidIndent(), which overrides Neovim's default Markdown indent logic. This causes gq to incorrectly format wrapped list items in Jekyll posts, but only for bulleted lists (-, *). Numbered lists (1.) continue to format correctly.

The bug is present with Neovim 0.9.5 and Vim 8.2.2121.

Example of Bug

Before Formatting (gq)

---
title: foo
---
- "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat."

1. "Sed ut perspiciatis unde omnis iste natus error sit voluptatem accusantium doloremque laudantium, totam rem aperiam, eaque ipsa quae ab illo inventore veritatis et quasi architecto beatae vitae dicta sunt explicabo."

After Formatting (Actual Result)

The bulleted list is broken, but the numbered list is correct.

---
title: foo
---
- "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod
tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam,
quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo
consequat."

1. "Sed ut perspiciatis unde omnis iste natus error sit voluptatem
   accusantium doloremque laudantium, totam rem aperiam, eaque ipsa quae ab
   illo inventore veritatis et quasi architecto beatae vitae dicta sunt
   explicabo."

After Formatting (Expected Result)

Both lists should be correctly indented.

---
title: foo
---
- "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod
  tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam,
  quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo
  consequat."

1. "Sed ut perspiciatis unde omnis iste natus error sit voluptatem
   accusantium doloremque laudantium, totam rem aperiam, eaque ipsa quae ab
   illo inventore veritatis et quasi architecto beatae vitae dicta sunt
   explicabo."

Workaround

An after/indent/liquid.vim file with the following content fixes the issue by restoring Neovim's default indent logic for the buffer:

setlocal indentexpr=

Apologies for not offering a patch to the function in question, my Vimscript is... essentially non-existent. 😅

[agude]

I also built an (overkill) script using Docker that reproduces the bug in a clean install with just this plugin and Neovim:

#!/bin/bash

# This script builds a fully automated, self-contained Docker image for
# reproducing the vim-liquid bug. It incorporates the user's critical
# discovery that YAML front matter is required to trigger the filetype detection.

set -e

# --- Configuration ---
REPRO_DIR="nvim-jekyll-repro"
IMAGE_NAME="nvim-repro-image"
INIT_FILE="minimal_init.vim"
POST_FILE="test.md"

# --- Main Script ---

echo "--- Cleaning up old Docker test environment (if any)..."
rm -rf "$REPRO_DIR"

echo "--- Creating self-contained directory for Docker build..."
mkdir -p "$REPRO_DIR"
cd "$REPRO_DIR"

echo "--- Creating Dockerfile..."
cat > Dockerfile << 'EOF'
# Use a standard Ubuntu LTS image for a predictable environment.
FROM ubuntu:24.04

# Install dependencies non-interactively.
ENV DEBIAN_FRONTEND=noninteractive
RUN apt-get update && apt-get install -y neovim git curl && rm -rf /var/lib/apt/lists/*

# Set up the default Neovim config directory and download vim-plug.
RUN curl -fLo /root/.config/nvim/autoload/plug.vim --create-dirs \
    https://raw.githubusercontent.com/junegunn/vim-plug/master/plug.vim

# Copy our minimal config into the image.
COPY minimal_init.vim /root/.config/nvim/init.vim

# Install the vim-liquid plugin during the image build process.
RUN nvim --headless "+PlugInstall --sync" +qa

# Set up the test directory and copy the test file into it.
WORKDIR /repro
RUN mkdir -p _posts
COPY test.md _posts/
EOF

# This init.vim enables the necessary features and declares the plugin.
echo "--- Creating minimal init.vim..."
cat > "$INIT_FILE" << EOF
" Enable filetype detection, plugin scripts, and indent scripts.
filetype plugin indent on

" Initialize vim-plug and declare the plugin.
call plug#begin()
Plug 'tpope/vim-liquid'
call plug#end()
EOF

# THIS IS THE CRITICAL FIX: The test file now includes YAML front matter.
echo "--- Creating test Jekyll post with YAML front matter..."
cat > "$POST_FILE" << EOF
---
layout: post
title: "Test Post"
---

- "Lorem ipsum dolor sit amet, consectetur adipiscing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. Ut enim ad minim veniam, quis nostrud exercitation ullamco laboris nisi ut aliquip ex ea commodo consequat. Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum."
EOF

echo "--- Building Docker image '$IMAGE_NAME'..."
docker build -t "$IMAGE_NAME" .

cd ..

echo ""
echo "Docker setup complete! The automated reproduction is ready."
echo "------------------------------------------------------------------"
echo
echo "To reproduce the bug, run this single command:"
echo
echo "docker run --rm -it $IMAGE_NAME nvim _posts/$POST_FILE"
echo
echo "------------------------------------------------------------------"
echo "To clean up afterward:"
echo "   - Docker Image: docker rmi $IMAGE_NAME"
echo "   - Build Files:  rm -rf $REPRO_DIR"
echo "------------------------------------------------------------------"