<% can anybody hear me? %>

When learning PHP I spent hours fixing errors simply because I forgot to put a semicolon ';' at the end of a line

Creating my first Ruby on Rails application today I've just spent hours on one small part just because I forgot the equal '=' sign in the view file where I wanted to see things

<% can anybody hear me? %>
nope.
<%= We hear you now Steve! %>
hooray!