Allow some table headers to be seen in JavaDoc
Allow some table headers to be seen in JavaDoc

This improves some JavaDoc tables that contain headers in:
org/gradle/api/Project
org/gradle/api/artifacts/dsl/RepositoryHandler
org/gradle/api/plugins/MavenRepositoryHandlerConvention
org/gradle/api/tasks/TaskContainer
org/gradle/nativeplatform/platform/Architecture
org/gradle/nativeplatform/platform/OperatingSystem

gstevey/gradle,robinverduijn/gradle,gstevey/gradle,lsmaira/gradle,robinverduijn/gradle,gradle/gradle,gstevey/gradle,lsmaira/gradle,robinverduijn/gradle,gradle/gradle,lsmaira/gradle,blindpirate/gradle,lsmaira/gradle,gradle/gradle,gradle/gradle,robinverduijn/gradle,blindpirate/gradle,blindpirate/gradle,lsmaira/gradle,lsmaira/gradle,lsmaira/gradle,robinverduijn/gradle,lsmaira/gradle,gradle/gradle,robinverduijn/gradle,robinverduijn/gradle,blindpirate/gradle,blindpirate/gradle,gstevey/gradle,gstevey/gradle,gstevey/gradle,gradle/gradle,blindpirate/gradle,robinverduijn/gradle,gstevey/gradle,gradle/gradle,gstevey/gradle,lsmaira/gradle,blindpirate/gradle,blindpirate/gradle,robinverduijn/gradle,gradle/gradle,robinverduijn/gradle,blindpirate/gradle,gradle/gradle,gradle/gradle,blindpirate/gradle,robinverduijn/gradle,lsmaira/gradle,gstevey/gradle