Merge pull request #6573 from IoannisPanagiotas/steiner-forgot-delta

[Steiner] Two minors in docs

Author: vnickolov

doc/modules/ROOT/pages/algorithms/directed-steiner-tree.adoc

@@ -415,7 +415,11 @@ It is also possible to try and augment the solution discovered by the heuristic
 This option can be enabled by setting  `applyRerouting:true` in the configuration.
 
 The rerouting phase re-examines the relationships in the discovered steiner tree and tries to reroute nodes (that is change their parent with another node in the tree) so as to decrease the cost.
-The rerouting phase might even have as an effect that some nodes are removed for a tree.
+After the rerouting phase some nodes might end up being childless, that is not part of any path between the source and a target.
+Such nodes are then removed from the returned solution.
+
+Note that there is no guarantee that enabling rerouting will always lead to an improvement in quality.
+
 
 [role=query-example]
 --

doc/modules/ROOT/partials/algorithms/shortest-path/path-syntax.adoc

@@ -43,7 +43,7 @@ ifeval::["{algorithm}" == "Yen's"]
 | k                                                                                | Integer | 1       | yes      | The number of shortest paths to compute between source and target node.
 endif::[]
 ifeval::["{algorithm}" == "Delta-Stepping"]
-| delta                                                                            | Float   | 2       | yes      | The bucket width for grouping nodes with the same tentative distance to the source node.
+| delta                                                                            | Float   | 2.0       | yes      | The bucket width for grouping nodes with the same tentative distance to the source node.
 endif::[]
 | xref:common-usage/running-algos.adoc#common-configuration-relationship-weight-property[relationshipWeightProperty] | String  | null    | yes      | Name of the relationship property to use as weights. If unspecified, the algorithm runs unweighted.
 |===

doc/modules/ROOT/partials/algorithms/steiner-tree/specific-configuration.adoc

@@ -1,4 +1,5 @@
 | sourceNode                                                                      | Integer | null      | n/a        | The starting source node ID.
 | targetNodes                                                                      | List of Integer | null      | n/a        | The list of target nodes
 | xref:common-usage/running-algos.adoc#common-configuration-relationship-weight-property[relationshipWeightProperty] | String  | null      | yes       | Name of the relationship property to use as weights. If unspecified, the algorithm runs unweighted.
+| delta                                                                            | Float   | 2.0       | yes      | The bucket width for grouping nodes with the same tentative distance to the source node. Look into the xref:algorithms/delta-single-source.adoc[Delta-Stepping] documentation for more information.
 | applyRerouting  | boolean | false  | yes      | If specified, the algorithm will try to improve the outcome via an additional post-processing heuristic.