Reactivate the bigram prediction option

                android:summary="@string/bigram_suggestion_summary"

                android:persistent="true"

                android:defaultValue="true" />

            <CheckBoxPreference

                android:key="bigram_prediction"

                android:dependency="bigram_suggestion"

                android:title="@string/bigram_prediction"

                android:summary="@string/bigram_prediction_summary"

                android:persistent="true"

                android:defaultValue="false" />

            <CheckBoxPreference

                android:key="enable_span_insert"

                android:title="@string/enable_span_insert"

            <PreferenceScreen

                android:key="pref_keypress_sound_volume"

                android:title="@string/prefs_keypress_sound_volume_settings" />

            <!-- TODO: evaluate results and revive this option. The code

                already supports it. -->

            <!-- <CheckBoxPreference -->

            <!-- android:key="bigram_prediction" -->

            <!-- android:dependency="bigram_suggestion" -->

            <!-- android:title="@string/bigram_prediction" -->

            <!-- android:summary="@string/bigram_prediction_summary" -->

            <!-- android:persistent="true" -->

            <!-- android:defaultValue="false" /> -->

        </PreferenceScreen>

    </PreferenceCategory>

</PreferenceScreen>