help_string = r"""
# md2ltx

A command-line tool for converting Markdown to PDF via Pandoc and LaTeX. Requires a pip virtual environment in Ubuntu/ Debian based OS.

## Installation

    pip install md2ltx; md2ltx --install_dependencies

## Usage

    md2ltx [source.md] [output.pdf] [--open] [--help]

## Positional Arguments

• <strong>source_file</strong>  
  Path to the input Markdown (.md) file.  

• <strong>output_pdf</strong> (optional)  
  Path to the output PDF file. If omitted, a default name is derived from the source file, and the working directory is assumed to be the path.  

## Optional Switches

• <strong>--open</strong>  
  Open the resulting PDF in the system’s default viewer.  

• <strong>--help</strong>  
  Show this help message and exit.  

## Description

md2ltx uses Pandoc to transform Markdown files into LaTeX, which pdflatex then uses to generate a final PDF. This workflow supports most of Markdown’s core syntax plus many Pandoc extensions. Below is a high-level overview of how Pandoc typically converts various Markdown constructs into LaTeX. For full details, refer to Pandoc’s official documentation.

---

### 1) Headings

• <strong>Markdown</strong>  
  <pre><code># Heading 1  
## Heading 2  
### Heading 3</code></pre>

• <strong>Pandoc → LaTeX</strong>  
  <pre><code>\section{Heading 1}  
\subsection{Heading 2}  
\subsubsection{Heading 3}</code></pre>

Pandoc chooses <code>\section</code>, <code>\subsection</code>, etc. based on the heading level. It also supports underline-style Markdown headings with “===” or “---” for level-one and level-two headings.

---

### 2) Emphasis &amp; Strong Emphasis

• <strong>Markdown</strong>  
  <pre><code>*emphasis* or _emphasis_  
**strong emphasis** or __strong emphasis__</code></pre>

• <strong>Pandoc → LaTeX</strong>  
  <pre><code>\emph{emphasis}  
\textbf{strong emphasis}</code></pre>

---

### 3) Inline Code

• <strong>Markdown</strong>  
  <pre><code>`inline code`</code></pre>

• <strong>Pandoc → LaTeX</strong>  
  <pre><code>\texttt{inline code}</code></pre>

---

### 4) Code Blocks

• <strong>Markdown (fenced)</strong>  
  <pre><code>```  
a = 1  
b = 2  
```</code></pre>

• <strong>Pandoc → LaTeX (by default)</strong>  
  <pre><code>\begin{verbatim}  
a = 1  
b = 2  
\end{verbatim}</code></pre>

With certain options, Pandoc can use different LaTeX environments (e.g., listings).

---

### 5) Lists

• <strong>Unordered (Markdown)</strong>  
  <pre><code>- item 1  
- item 2  
- item 3</code></pre>

• <strong>Pandoc → LaTeX</strong>  
  <pre><code>\begin{itemize}  
\item item 1  
\item item 2  
\item item 3  
\end{itemize}</code></pre>

• <strong>Ordered (Markdown)</strong>  
  <pre><code>1. item 1  
2. item 2</code></pre>

• <strong>Pandoc → LaTeX</strong>  
  <pre><code>\begin{enumerate}  
\item item 1  
\item item 2  
\end{enumerate}</code></pre>

---

### 6) Links &amp; Images

• <strong>Link (Markdown)</strong>  
  <pre><code>[Pandoc](https://pandoc.org)</code></pre>

• <strong>Pandoc → LaTeX</strong>  
  <pre><code>\href{https://pandoc.org}{Pandoc}</code></pre>

• <strong>Image (Markdown)</strong>  
  <pre><code>![Alt text](image.png)</code></pre>

• <strong>Pandoc → LaTeX</strong>  
  <pre><code>\includegraphics{image.png}</code></pre>

By default, <code>\includegraphics</code> is placed without floats. You can add captions or figure environments using extended syntax or metadata.

---

### 7) Blockquotes

• <strong>Markdown</strong>  
  <pre><code>> This is a blockquote.</code></pre>

• <strong>Pandoc → LaTeX</strong>  
  <pre><code>\begin{quote}  
This is a blockquote.  
\end{quote}</code></pre>

---

### 8) Horizontal Rules

• <strong>Markdown</strong>  
  <pre><code>---  
***  
___</code></pre>

• <strong>Pandoc → LaTeX</strong>  
  <pre><code>\hrule</code></pre>

---

### 9) Footnotes (Pandoc Extension)

• <strong>Markdown</strong>  
  <pre><code>This is some text with a footnote.[^1]

[^1]: This is the footnote text.</code></pre>

• <strong>Pandoc → LaTeX</strong>  
  <pre><code>This is some text with a footnote.\footnote{This is the footnote text.}</code></pre>

---

### 10) Tables

• <strong>Markdown (simple pipe table)</strong>  
  <pre><code>| Column1 | Column2 |  
|---------|---------|  
| Val1    | Val2    |  
| Val3    | Val4    |</code></pre>

• <strong>Pandoc → LaTeX</strong>  
  <pre><code>\begin{table}  
\centering  
\begin{tabular}{ll}  
\hline  
Column1 & Column2 \\  
\hline  
Val1    & Val2    \\  
Val3    & Val4    \\  
\hline  
\end{tabular}  
\end{table}</code></pre>

---

### 11) Math &amp; LaTeX Blocks

• <strong>Inline Math</strong>  
  <pre><code>$E = mc^2$</code></pre>

• <strong>Pandoc → LaTeX</strong>  
  <pre><code>\(E = mc^2\)</code></pre>

• <strong>Display Math</strong>  
  <pre><code>$$  
E = mc^2  
$$</code></pre>

• <strong>Pandoc → LaTeX</strong>  
  <pre><code>\[  
E = mc^2  
\]</code></pre>

---

### 12) Citations &amp; Bibliographies

Pandoc can handle citations if you provide a bibliography file. A reference like <code>[@smith2009]</code> can become <code>\cite{smith2009}</code> or <code>\autocite</code> depending on the style and Pandoc’s command-line options.

---

### 13) Metadata &amp; Title Blocks

Markdown with a YAML metadata block (e.g., “title: My Title”) can become <code>\title</code>, <code>\author</code>, etc., in LaTeX. Use <code>-s</code> or <code>--standalone</code> to generate a title page and call <code>\maketitle</code>.

---

### 14) Raw LaTeX

Pandoc passes raw LaTeX through if you’re converting to LaTeX or PDF. For example:

```
\newpage
```

remains <code>\newpage</code> in the output.

---



"""
