(bug 46075) diff view support for multiline references

- when we have multiline references the whole snaklist will be
  shown in diff view

patchset 4: added @since tag
patchset 5: changed seperator in property-value pairs from "/" to ":"

Change-Id: I6c25d2aa6761bb3f6ffe0107c41c643617ced979
Merge "(bug 46075) diff view support for multiline references"