Fixing calculator hint to display correct definition of the constant T

AUTHORS

@@ -159,4 +159,5 @@ Brandon DeRosier <btd@cheesekeg.com>
 Daniel Li <swli@edx.org>
 Daniel Friedman <dfriedman@edx.org>
 Asad Iqbal <aiqbal@edx.org>
+Peter Pinch <pdpinch@mit.edu>
 Muhammad Shoaib <mshoaib@edx.org>

lms/templates/courseware/courseware.html

@@ -331,7 +331,7 @@ ${fragment.foot_html()}
                               <tr>
                                 <td>T</td>
                                 <td>=</td>
-                                <td>${_("freezing point of water in degrees Kelvin")}</td>
+                                <td>${_("Typical room temperature: 298.15 (Kelvin), same as 25C/77F")}</td>
                               </tr>
                               <tr>
                                 <td>q</td>