Pull out the matching issue number string from the "Notes" and
"Description" columns in the journals and issues tables, respectively:
(There are 32 occurances of this in the journals::notes table based on
the VLab March 19th backup)
  - Determine if the issue number matches a source issue number, if so
get the merged issue number
  - Replace the source issue number with the merged issue number in the
"notes" column