856 URLs being duplicated in subsequent Holdings

[gibsonjc]

This is a new, standalone Issue from a recent addition to #16 .

URLs are being improperly displayed in MFHDs that they don't belong in.

A URL in MFHD 1 shows up there once.
In MFHD 2, MFHD 2's URL and MFHD 1's URL shows up.
In MFHD 3, you see MFHD 3's URL, MFHD 2's URL, and MFHD 1's URL.
etc.

Example 1: (The American journal of photography (OCoLC)875140764 )
https://vufind3.carli.illinois.edu/all/vf-uiu/Record/222647703
UIC's URL appears in their Holding and again in UIU's holding

Example 2: (title: Grand Canyon: tuweep (OCoLC)948299582 )
https://vufind3.carli.illinois.edu/all/vf-sxu/Record/259453728
Each library has the same URL in this example because it is a government publication, but notice how each Holding adds another instance of the URL.

Example 3: (title: The death and life of American journalism the media revolution that will begin the world again (OCoLC)748371318)
https://vufind3.carli.illinois.edu/all/vf-uiu/Record/256396950
The proxy string for each library is different so you can see how they are repeating in each subsequent Holding.

[gibsonjc]

On 6/1, noticed (and fixed) a display variable not being initialized properly. Commit 91ed4ed

This appears to have fixed these examples in I-Share view with multiple institutions. However, there also appears to be a variant of the duplicating URL when there is more than one MFHD for a single institution.

Example: (Tristram Shandy and the editors)
https://vufind3.carli.illinois.edu/vf-eiu/Record/(EIUdb)360183
and
https://vufind3.carli.illinois.edu/all/vf-eiu/Record/249975288

The URL for the electronic version only exists in the Electronic Theses MFHD but appears in the Stacks and Special Collections MFHDs too in both local and I-Share views.