am b3f7278a: Update comments for shortcut button content descriptions

    <!-- Content description for 'arctan' button. [CHAR_LIMIT=NONE] -->

    <string name="desc_fun_arctan">inverse tangent</string>

    <!-- Content description for 10^ button. [CHAR_LIMIT=NONE] -->

    <!--

      Content description for 10^ button. This button is used to raise 10 to the subsequently

      entered power. E.g. <10^>3 would yield 1000.

      [CHAR_LIMIT=NONE]

      -->

    <string name="desc_fun_10pow">ten to the power of</string>

    <!-- Content description for e^ button. [CHAR_LIMIT=NONE] -->

    <!-- Content description for e^ (exponential function) button. [CHAR_LIMIT=NONE] -->

    <string name="desc_fun_exp">exponential function</string>

    <!-- Content description for ^2 button. [CHAR_LIMIT=NONE] -->

    <!--

      Content description for ^2 button. This button is used to square the previously entered

      number. E.g. 3<^2> would yield 9.

      [CHAR_LIMIT=NONE]

      -->

    <string name="desc_op_sqr">squared</string>

    <!-- Content description for '+' button. [CHAR_LIMIT=NONE] -->