Added mermaid test cases for class diagrams

docs/test_cases/t00002_class_mermaid.svg

@@ -1,4 +1,4 @@
-<svg xmlns:xlink="http://www.w3.org/1999/xlink" xmlns="http://www.w3.org/2000/svg" aria-roledescription="classDiagram" role="graphics-document document" viewBox="0 0 426.921875 441" style="max-width: 426.922px; background-color: white;" width="100%" id="my-svg">
+<svg xmlns:xlink="http://www.w3.org/1999/xlink" xmlns="http://www.w3.org/2000/svg" aria-roledescription="classDiagram" role="graphics-document document" viewBox="0 0 426.921875 441" style="max-width: 426.922px; background-color: white;" width="100%" id="my-svg" width="427">
   <style>#my-svg{font-family:"trebuchet ms",verdana,arial,sans-serif;font-size:16px;fill:#333;}#my-svg .error-icon{fill:#552222;}#my-svg .error-text{fill:#552222;stroke:#552222;}#my-svg .edge-thickness-normal{stroke-width:2px;}#my-svg .edge-thickness-thick{stroke-width:3.5px;}#my-svg .edge-pattern-solid{stroke-dasharray:0;}#my-svg .edge-pattern-dashed{stroke-dasharray:3;}#my-svg .edge-pattern-dotted{stroke-dasharray:2;}#my-svg .marker{fill:#333333;stroke:#333333;}#my-svg .marker.cross{stroke:#333333;}#my-svg svg{font-family:"trebuchet ms",verdana,arial,sans-serif;font-size:16px;}#my-svg g.classGroup text{fill:#9370DB;fill:#131300;stroke:none;font-family:"trebuchet ms",verdana,arial,sans-serif;font-size:10px;}#my-svg g.classGroup text .title{font-weight:bolder;}#my-svg .nodeLabel,#my-svg .edgeLabel{color:#131300;}#my-svg .edgeLabel .label rect{fill:#ECECFF;}#my-svg .label text{fill:#131300;}#my-svg .edgeLabel .label span{background:#ECECFF;}#my-svg .classTitle{font-weight:bolder;}#my-svg .node rect,#my-svg .node circle,#my-svg .node ellipse,#my-svg .node polygon,#my-svg .node path{fill:#ECECFF;stroke:#9370DB;stroke-width:1px;}#my-svg .divider{stroke:#9370DB;stroke-width:1;}#my-svg g.clickable{cursor:pointer;}#my-svg g.classGroup rect{fill:#ECECFF;stroke:#9370DB;}#my-svg g.classGroup line{stroke:#9370DB;stroke-width:1;}#my-svg .classLabel .box{stroke:none;stroke-width:0;fill:#ECECFF;opacity:0.5;}#my-svg .classLabel .label{fill:#9370DB;font-size:10px;}#my-svg .relation{stroke:#333333;stroke-width:1;fill:none;}#my-svg .dashed-line{stroke-dasharray:3;}#my-svg .dotted-line{stroke-dasharray:1 2;}#my-svg #compositionStart,#my-svg .composition{fill:#333333!important;stroke:#333333!important;stroke-width:1;}#my-svg #compositionEnd,#my-svg .composition{fill:#333333!important;stroke:#333333!important;stroke-width:1;}#my-svg #dependencyStart,#my-svg .dependency{fill:#333333!important;stroke:#333333!important;stroke-width:1;}#my-svg #dependencyStart,#my-svg .dependency{fill:#333333!important;stroke:#333333!important;stroke-width:1;}#my-svg #extensionStart,#my-svg .extension{fill:#ECECFF!important;stroke:#333333!important;stroke-width:1;}#my-svg #extensionEnd,#my-svg .extension{fill:#ECECFF!important;stroke:#333333!important;stroke-width:1;}#my-svg #aggregationStart,#my-svg .aggregation{fill:#ECECFF!important;stroke:#333333!important;stroke-width:1;}#my-svg #aggregationEnd,#my-svg .aggregation{fill:#ECECFF!important;stroke:#333333!important;stroke-width:1;}#my-svg #lollipopStart,#my-svg .lollipop{fill:#ECECFF!important;stroke:#333333!important;stroke-width:1;}#my-svg #lollipopEnd,#my-svg .lollipop{fill:#ECECFF!important;stroke:#333333!important;stroke-width:1;}#my-svg .edgeTerminals{font-size:11px;}#my-svg .classTitleText{text-anchor:middle;font-size:18px;fill:#333;}#my-svg :root{--mermaid-font-family:"trebuchet ms",verdana,arial,sans-serif;}</style>
   <g>
     <defs>