title: Using RegEx to search and replace a number in a Notepad++ selection
body: <p>I just learned about regex and it's still quite confusing to me.</p>
  
  <p>For a start, I'm having a file in Notepad++ with 500k lines.
  At about line 394900 is some static content that needs to be replaced. It's not that much to do manually, but just for learning purpusses I'd like to do this via RegEx.</p>
  
  <p>The lines contain the following strings while X is a RandomNumber: {x 0.xxxxx xx.xxx}
  Now I have to replace the second number of each line before the .xxxxx</p>
  
  <p>So to make it short: {x 0.xxxxx xx.xxx} has to be replaced with {x 8.xxxxx xx.xxx} in each line.</p>
  
  <p>What would be the easiest way to do this via regex?</p>