Does As It Says, But Has Weird Layout

It’s odd that you’d put your text after the input field:

<label for="log"><input type="text" name="log" id="log" value="' . esc_html ( stripslashes ( $user_login ) , 1 ) . '" size="22" /> '
. apply_filters( 'pr_username_label', 'Username' ) . '</label><br />
<label for="pwd"><input type="password" name="pwd" id="pwd" size="22" /> '
. apply_filters( 'pr_password_label' , 'Password' ) . '</label><br />
<input type="submit" name="submit" value="Log In" class="button" />

Why not put it before like most login screens?

<label for="log"> '
. apply_filters( 'pr_username_label', 'Username' ) . '<input type="text" name="log" id="log" value="' . esc_html ( stripslashes ( $user_login ) , 1 ) . '" size="22" /></label><br />
<label for="pwd"> '
. apply_filters( 'pr_password_label' , 'Password' ) . '<input type="password" name="pwd" id="pwd" size="22" /></label><br />
<input type="submit" name="submit" value="Log In" class="button" />