consistent use of ||

Author: JPryce-Aklundh

modules/ROOT/pages/expressions/string-operators.adoc

@@ -66,7 +66,7 @@ RETURN 'Alpha' || 'Beta' AS result1,
 
 | "AlphaBeta" | "Alpha Beta"
 
-1+d| Rows: 1
+2+d| Rows: 1
 |===
 
 .Concatenating `STRING` properties
@@ -92,7 +92,7 @@ RETURN p.fullName AS fullName
 .Concatenate `STRING` values in a `LIST`
 [source, cypher]
 ----
-RETURN reduce(acc = '', item IN ['Neo', '4j'] | acc + item) AS result
+RETURN reduce(acc = '', item IN ['Neo', '4j'] | acc || item) AS result
 ----
 
 .Result
@@ -115,7 +115,7 @@ This ensures that all `NULL` values are effectively skipped, allowing the `reduc
 [source, cypher]
 ----
 WITH ['Neo', NULL, '4j', NULL, 'Hello', NULL] AS items
-RETURN reduce(acc = '', item IN items | acc + coalesce(item, '')) AS result
+RETURN reduce(acc = '', item IN items | acc || coalesce(item, '')) AS result
 ----
 
 .Result