old_contents: styles = {
      "line1": {
          "color": "black",
          "linestyle": "-",
          "linewidth": 1.2,
          "alpha": 0.3,
          "label": "stream raw"
      },
      "line2": {
          "color": "blue",
          "linestyle": "-",
          "linewidth": 1.4,
          "alpha": 1.0,
          "label": "stream de-spiked"
      },
      "line3": {
          "color": "green",
          "linestyle": "-",
          "linewidth": 1.4,
          "alpha": 1.0,
          "label": "stream de-spiked"
      },
      "point1": {
          "color": "red",
          "marker": "o",
          "markersize": 6,
          "markeredgecolor": "black",
          "alpha": 1.0,
          "linestyle": "None",
          "label": "dams"
      },
      "point2": {
          "color": "orange",
          "marker": "o",
          "markersize": 4,
          "markeredgecolor": "None",
          "alpha": 0.5,
          "linestyle": "None",
          "label": "left terrace"
      },
      "point3": {
          "color": "None",
          "marker": "o",
          "markersize": 4,
          "markeredgecolor": "brown",
          "alpha": 1.0,
          "linestyle": "None",
          "label": "right terrace"
      }
  }
new_contents: styles = {
      "line1": {
          "color": "black",
          "linestyle": "-",
          "linewidth": 1.2,
          "alpha": 0.3,
          "label": "line1"
      },
      "line2": {
          "color": "blue",
          "linestyle": "-",
          "linewidth": 1.4,
          "alpha": 1.0,
          "label": "line2"
      },
      "line3": {
          "color": "green",
          "linestyle": "-",
          "linewidth": 1.4,
          "alpha": 1.0,
          "label": "line3"
      },
      "point1": {
          "color": "red",
          "marker": "o",
          "markersize": 6,
          "markeredgecolor": "black",
          "alpha": 1.0,
          "linestyle": "None",
          "label": "point1"
      },
      "point2": {
          "color": "orange",
          "marker": "o",
          "markersize": 4,
          "markeredgecolor": "None",
          "alpha": 0.5,
          "linestyle": "None",
          "label": "point2"
      },
      "point3": {
          "color": "None",
          "marker": "o",
          "markersize": 4,
          "markeredgecolor": "brown",
          "alpha": 1.0,
          "linestyle": "None",
          "label": "point3"
      }
  }
subject: make style labels generic