I'm having a markdown file which is a little bit broken: the links and images which are too long have line-breaks in it. I would like to remove line-breaks from them. Example: from: See for example the [installation process for Ubuntu Trusty](https://wiki.diasporafoundation.org/Installation/Ubuntu/Trusty). The project offers a Vagrant installation too, but the documentation only admits that you know what you do, that you are a developer. If it is difficult to  _A pretty decentralized network (Source: <https://diasporafoundation.org/>)_ to: See for example the [installation process for Ubuntu Trusty](https://wiki.diasporafoundation.org/Installation/Ubuntu/Trusty). The project offers a Vagrant installation too, but the documentation only admits that you know what you do, that you are a developer. If it is difficult to  _A pretty decentralized network (Source: <https://diasporafoundation.org/>)_ As you can see in this snippet, I managed to match the all links and images with the right pattern: https://regex101.com/r/uL8pO4/2 But now, what is the syntax in Python to use a string method like string.trim() on what I have captured with regular expression? For the moment, I'm stuck with this: fix_newlines = re.compile(r'\[([\w\s*:/]*)\]\(([^()]+)\)') # Capture the links and remove line-breaks from their URLs # Something like r'[\1](\2)'.trim() ?? post['content'] = fix_newlines.sub(r'[\1](\2)', post['content']) Edit: I updated the example to be more explicit about my problem. Thank you for your answer Continue reading...