* stable-2.15:
Fix formatting in MergeInput documentation
Fix assertions on iterable size in tests
Fix example ref in 'Create Merge Patch Set For Change' documentation
Fix documentation for CreateMergePatchSetForChange REST API endpoint.
LightweightPluginDaemonTest: Expose plugin guice injectors
Change-Id: Ief9930217e4769aac629b076316cdb3b47edfd11