title: How do I make underscores visible again in Eclipse?
body: <p>After upgrading my workstation from Ubuntu 14.04 to Ubuntu 16.04 I found that all the underscore _ characters in my C and C++ code were invisible withing the Eclipse editor.  This means that <code>function_name</code> and <code>Class_Name</code> started displaying as <code>function name</code> and <code>Class Name</code>; although the _ character was still clearly there based on the syntax highlighting and the results of pasting into gedit.  </p>