Fix similarity algo descriptions (#721)

Author: tomasonjo

algo/src/main/java/org/neo4j/graphalgo/similarity/CosineProc.java

@@ -31,7 +31,7 @@
 public class CosineProc extends SimilarityProc {
 
     @Procedure(name = "algo.similarity.cosine.stream", mode = Mode.READ)
-    @Description("CALL algo.similarity.cosine.stream([{source:id, weights:[weights]}], {similarityCutoff:-1,degreeCutoff:0}) " +
+    @Description("CALL algo.similarity.cosine.stream([{item:id, weights:[weights]}], {similarityCutoff:-1,degreeCutoff:0}) " +
             "YIELD item1, item2, count1, count2, intersection, similarity - computes cosine distance")
     // todo count1,count2 = could be the non-null values, intersection the values where both are non-null?
     public Stream<SimilarityResult> cosineStream(

algo/src/main/java/org/neo4j/graphalgo/similarity/EuclideanProc.java

@@ -31,7 +31,7 @@
 public class EuclideanProc extends SimilarityProc {
 
     @Procedure(name = "algo.similarity.euclidean.stream", mode = Mode.READ)
-    @Description("CALL algo.similarity.euclidean.stream([{source:id, weights:[weights]}], {similarityCutoff:-1,degreeCutoff:0}) " +
+    @Description("CALL algo.similarity.euclidean.stream([{item:id, weights:[weights]}], {similarityCutoff:-1,degreeCutoff:0}) " +
             "YIELD item1, item2, count1, count2, intersection, similarity - computes euclidean distance")
     // todo count1,count2 = could be the non-null values, intersection the values where both are non-null?
     public Stream<SimilarityResult> euclideanStream(

algo/src/main/java/org/neo4j/graphalgo/similarity/JaccardProc.java

@@ -29,7 +29,7 @@
 public class JaccardProc extends SimilarityProc {
 
     @Procedure(name = "algo.similarity.jaccard.stream", mode = Mode.READ)
-    @Description("CALL algo.similarity.jaccard.stream([{source:id, targets:[ids]}], {similarityCutoff:-1,degreeCutoff:0}) " +
+    @Description("CALL algo.similarity.jaccard.stream([{item:id, categories:[ids]}], {similarityCutoff:-1,degreeCutoff:0}) " +
             "YIELD item1, item2, count1, count2, intersection, similarity - computes jaccard similarities")
     public Stream<SimilarityResult> similarityStream(
             @Name(value = "data", defaultValue = "null") List<Map<String,Object>> data,
@@ -45,7 +45,7 @@ public Stream<SimilarityResult> similarityStream(
     }
 
     @Procedure(name = "algo.similarity.jaccard", mode = Mode.WRITE)
-    @Description("CALL algo.similarity.jaccard([{source:id, targets:[ids]}], {similarityCutoff:-1,degreeCutoff:0}) " +
+    @Description("CALL algo.similarity.jaccard([{item:id, categories:[ids]}], {similarityCutoff:-1,degreeCutoff:0}) " +
             "YIELD p50, p75, p90, p99, p999, p100 - computes jaccard similarities")
     public Stream<SimilaritySummaryResult> jaccard(
             @Name(value = "data", defaultValue = "null") List<Map<String, Object>> data,