Mercury-IM/app/src/main/res/layout/view_message_text_out.xml

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"

    android:background="@null"
    android:layout_width="match_parent"
    android:layout_height="wrap_content">

    <TextView
        android:id="@+id/msg_body"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginTop="@dimen/msg_spacing_vertical"
        android:layout_marginEnd="@dimen/msg_margin_horizontal"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintTop_toTopOf="parent"

        style="@style/Widget.Theme.Mercury.TextView.Message"
        tools:text="@tools:sample/lorem" />

</androidx.constraintlayout.widget.ConstraintLayout>