plain-text -> plain text

    <string name="general_settings_contact_name_color_label">Contact name color</string>

    <string name="global_settings_messageview_fixedwidth_label">Fixed-width fonts</string>

    <string name="global_settings_messageview_fixedwidth_summary">Use a fixed-width font when showing plain-text messages</string>

    <string name="global_settings_messageview_fixedwidth_summary">Use a fixed-width font when showing plain text messages</string>

    <string name="global_settings_messageview_autofit_width_label">Auto-fit messages</string>

    <string name="global_settings_messageview_autofit_width_summary">Shrink messages to fit the screen</string>