title: How can I set the grep after context to be "until the next blank line"?
body: <p>With grep I know how to set the context to a fixed number of lines. Is it possible to show a context based on an arbitrary string condition, like set after-context to "until the next blank line"?</p>
  
  <p>Or possibly some other combination of tools?</p>
  
  <p>Basically I have a log file of contiguous lines, with blank lines separating the "events" I want to search for a string in the log file, but show the whole event....</p>