T.P.Citeproc.BibTeX: Protect case in periodical titles.

Thus, for example, `{npj} Quantum Information` should translate as
`[npj]{.nocase} Quantum Information`.

Closes #11048.

1 files changed, 48 insertions, 0 deletions

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+```
+% pandoc -f biblatex -t markdown -s
+@article{khatri2021spooky,
+    title = {Spooky action at a global distance: analysis of space-based
+             entanglement distribution for the quantum internet},
+    author = {Khatri, Sumeet and Brady, Anthony J and Desporte, Ren{\'e}e A and
+              Bart, Manon P and Dowling, Jonathan P},
+    journal = {{npj} Quantum Information},
+    volume = {7},
+    number = {1},
+    pages = {4},
+    doi = {10.1038/s41534-020-00327-5},
+    url = {https://doi.org/10.1038/s41534-020-00327-5},
+    year = {2021},
+    publisher = {Nature Publishing Group UK London},
+}
+^D
+---
+nocite: "[@*]"
+references:
+- author:
+  - family: Khatri
+    given: Sumeet
+  - family: Brady
+    given: Anthony J
+  - family: Desporte
+    given: Renée A
+  - family: Bart
+    given: Manon P
+  - family: Dowling
+    given: Jonathan P
+  container-title: "[npj]{.nocase} Quantum Information"
+  doi: 10.1038/s41534-020-00327-5
+  id: khatri2021spooky
+  issue: 1
+  issued: 2021
+  page: 4
+  publisher: Nature Publishing Group UK London
+  title: "Spooky action at a global distance: Analysis of space-based
+    entanglement distribution for the quantum internet"
+  title-short: Spooky action at a global distance
+  type: article-journal
+  url: "https://doi.org/10.1038/s41534-020-00327-5"
+  volume: 7
+---
+
+
+```