How to search and replace content programmatically? (XWiki.org)

History of How to search and replace content programmatically? — revisions from 1.2 to 6.1
From	To	Version	Editor	Date	Summary
From	To	6.1	Vincent Massol	2017/01/29	Rollback to version 1.2
From	To	5.1	Raghu Nath	2017/01/28	Rollback to version 2.1
From	To	4.1	Raghu Nath	2017/01/28	Rollback to version 1.2
From	To	3.1	Raghu Nath	2017/01/28	Rollback to version 1.2
From	To	2.1	Raghu Nath	2017/01/28	Uploaded new attachment "RCOSSignedOSIAffiliateAgreement.pdf", version 1.1
From	To	1.2	Vincent Massol	2017/01/26