1. solve the problem of duplicate comments and blank lines
2. reduce the data growth of the item table
3. in the same case, the size of ItemChangeSets can be reduced
4. when revoke configuration, if there is only one comment or blank line, it will not be deleted.

1. add CHANGES.md
2. PropertyResolver code style format
3. Revoke configurations cause the line num to be disordered

1. solve the problem of duplicate comments and blank lines
2. reduce the data growth of the item table
3. in the same case, the size of ItemChangeSets can be reduced
4. when revoke configuration, if there is only one comment or blank line, it will not be deleted.

1. add CHANGES.md
2. PropertyResolver code style format
3. Revoke configurations cause the line num to be disordered

…at' into feature/comment_and_blank_repeat

# Conflicts:
#	CHANGES.md