doc/syntax: add note about merging in records
@@ -156,6 +156,7 @@ Records are key-value storage, or in Nickel terms, field-value storage. They are
Field-value elements are noted as `field = value`.
The fields are strings, but can be noted as identifiers if they respect identifiers syntax (internally, they will be stored as strings). Values can be of any type.
Elements inside a record are unordered.
+Two records can be _merged_ together using the operator `&`. The reader can find more information about merging in the relevant documentation.
Examples:
```
