message: subscriber: fix buggy format with module disabled
  Closes
diff: @@ -256,17 +256,10 @@ where
  }
  };
  - write!(
  - writer,
  - "{} {}{}: ",
  - fmt_level,
  - full_ctx,
  + write!(writer, "{} {}", fmt_level, full_ctx)?;
  if self.display_target {
  - meta.target()
  - } else {
  - ""
  + write!(writer, "{}: ", meta.target())?;
  }
  - )?;
  ctx.format_fields(writer, event)?;
  writeln!(writer)
  }
  @@ -308,17 +301,10 @@ where
  (FmtLevel::new(meta.level()), FmtCtx::new(&ctx))
  }
  };
  - write!(
  - writer,
  - "{} {}{}: ",
  - fmt_level,
  - fmt_ctx,
  + write!(writer, "{} {}", fmt_level, fmt_ctx)?;
  if self.display_target {
  - meta.target()
  - } else {
  - ""
  + write!(writer, "{}:", meta.target())?;
  }
  - )?;
  ctx.format_fields(writer, event)?;
  let span = ctx.ctx.current_span();
  if let Some(id) = span.id() {
  