Polish documentation for SpEL Elvis operator

framework-docs/modules/ROOT/pages/core/expressions/language-ref/operator-elvis.adoc

@@ -1,10 +1,10 @@
 [[expressions-operator-elvis]]
 = The Elvis Operator
 
-The Elvis operator is a shortening of the ternary operator syntax and is used in the
-https://www.groovy-lang.org/operators.html#_elvis_operator[Groovy] language. With the
-ternary operator syntax, you often have to repeat a variable twice, as the following
-Java example shows:
+The Elvis operator (`?:`) is a shortening of the ternary operator syntax and is used in
+the https://www.groovy-lang.org/operators.html#_elvis_operator[Groovy] language. With the
+ternary operator syntax, you often have to repeat a variable twice, as the following Java
+example shows:
 
 [source,java,indent=0,subs="verbatim,quotes"]
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