SPR-7674 - Documented value defaulting in Spring EL
SPR-7674 - Documented value defaulting in Spring EL

Added short note of how to use the Elvis operator for defaulting values in the Spring expression language sections.

spring-projects/spring-framework,spring-projects/spring-framework,spring-projects/spring-framework,spring-projects/spring-framework,spring-projects/spring-framework,spring-projects/spring-framework,spring-projects/spring-framework