Path, Paths, RegexSet: Implement toString

wot-dijkstra/src/main/kotlin/org/pgpainless/wot/dijkstra/sq/Path.kt

@@ -120,4 +120,8 @@ class Path(
         residualDepth = certification.trustDepth.min(residualDepth.decrease(1))
         edges.add(certification)
     }
+
+    override fun toString(): String {
+        return "{${root.fingerprint}} => {${edges.map { it.target }.joinToString(" -> ")}} (residual {$residualDepth})"
+    }
 }

wot-dijkstra/src/main/kotlin/org/pgpainless/wot/dijkstra/sq/Paths.kt

@@ -46,6 +46,8 @@ class Paths(private val _paths: MutableList<Item>) {
      * @param amount trust amount
      */
     data class Item(val path: Path, val amount: Int) {
-
+        override fun toString(): String {
+            return "$path ($amount)"
+        }
     }
 }

wot-dijkstra/src/main/kotlin/org/pgpainless/wot/dijkstra/sq/RegexSet.kt

@@ -48,4 +48,8 @@ data class RegexSet(val regexStrings: Set<String>) {
             Pattern.compile(it).matcher(string).find()
         }
     }
+
+    override fun toString(): String {
+        return regexStrings.joinToString(", ")
+    }
 }