Better handle edited citations with single characters

[dstillman]

https://forums.zotero.org/discussion/113916/problem-on-google-doc-debug-id-included and others

I can't remember if we talked about a solution for this.

[dstillman]

https://forums.zotero.org/discussion/113245/google-docs-zotero-stopped-working https://forums.zotero.org/discussion/114760/google-docs-flashing-green-and-unable-to-add-citations-bibliography-or-anything https://forums.zotero.org/discussion/116625/zotero-wont-add-citation-bibliography-on-google-docs https://forums.zotero.org/discussion/117009/endless-loop-in-google-docs

and more