Issue with bibliography

Backup files are properly ignored now.

doc/user-manual/.gitignore

@@ -6,6 +6,7 @@
 *.aux
 *.ps
 bibliography.bib.bak
+bibliography.bib.sav
 *.bbl
 *.blg
 *.out

doc/user-manual/bibliography.bib.sav

@@ -1,77 +0,0 @@
-% Encoding: UTF-8
-
-@InProceedings{boris1970relativistic,
-  author    = {Boris, Jay P},
-  booktitle = {Proc. Fourth Conf. Num. Sim. Plasmas},
-  title     = {Relativistic plasma simulation-optimization of a hybrid code},
-  year      = {1970},
-  pages     = {3--67},
-}
-
-@article{higginson2020corrected,
-  title={A corrected method for Coulomb scattering in arbitrarily weighted particle-in-cell plasma simulations},
-  author={Higginson, Drew Pitney and Holod, Ihor and Link, Anthony},
-  journal={Journal of Computational Physics},
-  volume={413},
-  pages={109450},
-  year={2020},
-  publisher={Elsevier}
-}
-
-@Misc{gfortranURL,
-  author       = {GNU Project},
-  title        = {gfortran - the GNU Fortran compiler},
-  howpublished = {\url{https://gcc.gnu.org/wiki/GFortran}},
-}
-
-@Misc{ifortURL,
-  author       = {Intel\textsuperscript{\textregistered}},
-  title        = {Intel\textsuperscript{\textregistered} Fortran Compiler},
-  howpublished = {\url{https://software.intel.com/content/www/us/en/develop/tools/oneapi/components/fortran-compiler.html}},
-}
-
-@Misc{openblasURL,
-  title        = {OpenBLAS, an optimized BLAS library},
-  howpublished = {\url{https://www.openblas.net/}},
-}
-
-@Misc{jsonfortranURL,
-  title        = {JSON-Fortran},
-  howpublished = {\url{https://github.com/jacobwilliams/json-fortran}},
-}
-
-@Misc{jsonURL,
-  title        = {JSON, JavaScript Object Notation},
-  howpublished = {\url{https://www.json.org/json-en.html}},
-}
-
-@Misc{gmshURL,
-  author       = {Christophe Geuzaine and Jean-François Remacle},
-  title        = {Gmsh},
-  howpublished = {\url{https://gmsh.info/}},
-}
-
-@Article{welford1962note,
-  author    = {Welford, BP},
-  journal   = {Technometrics},
-  title     = {Note on a method for calculating corrected sums of squares and products},
-  year      = {1962},
-  number    = {3},
-  pages     = {419--420},
-  volume    = {4},
-  publisher = {Taylor \& Francis},
-}
-
-@Article{sherlock2008monte,
-  author    = {Sherlock, Mark},
-  journal   = {Journal of Computational Physics},
-  title     = {A Monte-Carlo method for Coulomb collisions in hybrid plasma models},
-  year      = {2008},
-  number    = {4},
-  pages     = {2286--2292},
-  volume    = {227},
-  groups    = {Particle-in-cell},
-  publisher = {Elsevier},
-}
-
-@Comment{jabref-meta: databaseType:bibtex;}