Fix incorrect code block syntax in markdown files

Corrected code block syntax in multiple markdown files to ensure proper rendering. Changes include fixing redundant or incorrect language specifiers and removing unnecessary characters in code block declarations.

business/proposal-writer.md

@@ -90,7 +90,7 @@ Please structure the proposal with:
 
 ## Example Output
 
-```markdownmarkdown
+```markdown
 # Inventory Management System Implementation Proposal
 
 **Prepared for:** GreenTech Manufacturing  

development/documentation-generator.md

@@ -56,7 +56,8 @@ Additional context:
 
 ## Example Input
 
-```markdownpython
+```markdown
+```python
 import requests
 import json
 from typing import Dict, List, Optional
@@ -89,9 +90,10 @@ class WeatherAPI:
         return response.json()["forecast"]
 ```
 
+```
 ## Example Output
 
-```markdownmarkdown
+```markdown
 # WeatherAPI Documentation
 
 ## Overview

writing/creative-story-generator.md

@@ -72,7 +72,7 @@ Ensure the story is original, engaging, and appropriate for the intended audienc
 
 ## Example Input
 
-```markdowntext
+```markdown
 Genre: Fantasy
 Story length: Short story (2000-3000 words)
 Target audience: Young Adult
@@ -89,7 +89,7 @@ Key plot points: Discovery of ability, meeting a mentor figure, facing a threat
 
 ## Example Output
 
-```markdownmarkdown
+```markdown
 # The Sight
 
 I used to think the shimmering lights in my peripheral vision were just stress-induced migraines. Turns out, I was half right about the stress part.

writing/github-copilot-prompt-generator.md

@@ -75,8 +75,6 @@ I need to add user authentication to my Express.js API. Users should be able to
 
 ## Example Output
 
-```markdown`markdown
-
 ```markdown
 ## Objective
 

writing/prompt-generator.md

@@ -46,8 +46,6 @@ I need an AI to help me write product descriptions for my e-commerce store. The
 
 ## Example Output
 
-```markdown`markdown
-
 ```
 You are a skilled copywriter specializing in artisan product descriptions. Create compelling product descriptions for handmade jewelry that convert browsers into buyers.