The full Markdown content to analyze.
The current cursor position, specified as an object with line and ch (character) properties.
The auto-numbering configuration object containing all settings.
The equation tag string if the cursor is inside an equation, or null otherwise.
Determines the auto-generated equation number tag at the current cursor position within a Markdown document.
This function analyzes the content up to the cursor position, tracking heading levels, code blocks, and equation blocks, and returns the appropriate equation tag if the cursor is inside an equation (single-line or block).