Update modules/ROOT/pages/queries/expressions.adoc

Co-authored-by: Jens Pryce-Åklundh <[email protected]>

Author: nadja-muller

modules/ROOT/pages/queries/expressions.adoc

@@ -91,7 +91,9 @@ String literals can contain the following escape sequences:
 
 Rules on string expressions for graph references when using identifiers (static graph references, administration commands) or a string (graph.byName function):
 
-* Unquoted dots are separators between a composite database and its constituent. For example, `composite.db1` represents the constituent composite.db1 in the composite database composite. To refer to a database with a dot in its name, quote the graph reference instead: `+`composite.db1`+`
+* Unquoted dots are separators between a composite database and its constituent. 
+For example, `composite.db1` represents the constituent `composite.db1` in the composite database `composite`.
+To refer to a database with a dot (`.`) in its name, quote the graph reference instead: `++`composite.db1`++`.
 * When resolving a graph reference within a graph function,  the string argument is parsed like a static graph reference.
  Thus, `USE graph.byName(<graph-reference>)` is typically equivalent to `USE <graph-reference>`.
  However, escaping rules for xref::syntax/naming.adoc#symbolic-names-escaping-rules[symbolic names] are applied to the argument.