postgres-readme-join-lines.py

import sys

def join_paragraph_lines(input_text):
    paragraphs = input_text.strip().split('\n\n')
    
    joined_paragraphs = []
    
    for paragraph in paragraphs:
        lines = paragraph.splitlines()
        sep = ''
        aggregate = ''
        
        for i, line in enumerate(lines):
            if i == 0:
                sep = ''
            elif line.startswith('----') or line.startswith('====') or line.startswith('\t'):
                sep = '\n'        
            else:
                sep = ' '
            aggregate += sep + line

        joined_paragraphs.append(aggregate)
    
    return '\n\n'.join(joined_paragraphs)

input_text = sys.stdin.read()

result = join_paragraph_lines(input_text)
print(result)