Fix formatting in 'TCF support classes' section of ref
Fix formatting in 'TCF support classes' section of ref

This commit fixes some formatting issues in the 'TestContext Framework
support classes' section of the reference manual that were introduced
in the conversion from DocBook to AsciiDoc.

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