Not sure why these had capital-I's in them, since the text just above shows…

Not sure why these had capital-I's in them, since the text just above shows lowercase-i's, and uppercase doesn't work properly.

common/lib/xmodule/test_files/symbolicresponse.xml

@@ -16,7 +16,7 @@ real time, next to the input box.
   <text>Compute [mathjax] U = \exp\left( i \theta \left[ \begin{matrix} 0 &amp; 1 \\ 1 &amp; 0 \end{matrix} \right] \right) [/mathjax]
       and give the resulting \(2 \times 2\) matrix. <br/>
       Your input should be typed in as a list of lists, eg <tt>[[1,2],[3,4]]</tt>. <br/>
-       [mathjax]U=[/mathjax] <symbolicresponse cfn="symmath_check" answer="[[cos(theta),I*sin(theta)],[I*sin(theta),cos(theta)]]" options="matrix,imaginary" id="filenamedogi0VpEBOWedxsymmathresponse_1" state="unsubmitted">
+       [mathjax]U=[/mathjax] <symbolicresponse cfn="symmath_check" answer="[[cos(theta),i*sin(theta)],[i*sin(theta),cos(theta)]]" options="matrix,imaginary" id="filenamedogi0VpEBOWedxsymmathresponse_1" state="unsubmitted">
           <textline size="80" math="1" response_id="2" answer_id="1" id="filenamedogi0VpEBOWedxsymmathresponse_2_1"/>
         </symbolicresponse>
       <br/>

common/test/data/full/problem/test_files/symbolicresponse.xml

@@ -19,7 +19,7 @@ from symmath import *
   <text>Compute [mathjax] U = \exp\left( i \theta \left[ \begin{matrix} 0 &amp; 1 \\ 1 &amp; 0 \end{matrix} \right] \right) [/mathjax]
       and give the resulting \(2 \times 2\) matrix. <br/>
       Your input should be typed in as a list of lists, eg <tt>[[1,2],[3,4]]</tt>. <br/>
-       [mathjax]U=[/mathjax] <symbolicresponse cfn="symmath_check" answer="[[cos(theta),I*sin(theta)],[I*sin(theta),cos(theta)]]" options="matrix,imaginary" id="filenamedogi0VpEBOWedxsymmathresponse_1" state="unsubmitted">
+       [mathjax]U=[/mathjax] <symbolicresponse cfn="symmath_check" answer="[[cos(theta),i*sin(theta)],[i*sin(theta),cos(theta)]]" options="matrix,imaginary" id="filenamedogi0VpEBOWedxsymmathresponse_1" state="unsubmitted">
           <textline size="80" math="1" response_id="2" answer_id="1" id="filenamedogi0VpEBOWedxsymmathresponse_2_1"/>
         </symbolicresponse>
       <br/>