adjust tests

test/fixtures/export/Minimize bibtex export package dependencies #1402.bibtex

@@ -1,5 +1,5 @@
 @article{xuOverallNormalizationAstrophysical1994,
-  title = {Overall {{Normalization}} of the {{Astrophysical}} {\textrightarrow} {{Reactions}}},
+  title = {Overall {{Normalization}} of the {{Astrophysical}} {$\rightarrow$} {{Reactions}}},
   author = {Xu, H. M. and Gagliardi, C. A. and Tribble, R. E. and Mukhamedzhanov, A. M. and Timofeyuk, N. K.},
   year = {1994},
   month = oct,
@@ -9,5 +9,5 @@
   pages = {2027--2030},
   doi = {10.1103/PhysRevLett.73.2027},
   urldate = {2020-01-16},
-  abstract = {We point out a simple relation between the nuclear vertex constant (NVC) and the overall normalization of the astrophysical S factor. Using predicted values of the NVC for the virtual decay of 8B{\textrightarrow}7Be+p we find S17(0){$\approx$}17.6 eVb for 7Be(p,{$\gamma$})8B reactions, consistent with the low values extrapolated from direct capture measurements by Filippone et al. and by Vaughn et al. New possibilities, using proton transfer reactions, to measure the astrophysical S factor indirectly are proposed.}
+  abstract = {We point out a simple relation between the nuclear vertex constant (NVC) and the overall normalization of the astrophysical S factor. Using predicted values of the NVC for the virtual decay of 8B{$\rightarrow$}7Be+p we find S17(0){$\approx$}17.6 eVb for 7Be(p,{$\gamma$})8B reactions, consistent with the low values extrapolated from direct capture measurements by Filippone et al. and by Vaughn et al. New possibilities, using proton transfer reactions, to measure the astrophysical S factor indirectly are proposed.}
 }

test/fixtures/export/Unbalanced vphantom escapes #1043-mathmode.bibtex

@@ -9,6 +9,6 @@
   pages = {957--967},
   doi = {10.1103/PhysRevA.7.957},
   urldate = {2016-08-03},
-  abstract = {The results of a close-coupling calculation of the fine-structure transitions (j,mj{\textrightarrow}j{$\prime$},m{$\prime$}j) are presented for collisions between photons and F(Pj,mj2). The theory is formulated in the perturbed-stationary-state approximation using accurate molecular wave functions for the ground II2 and {$\Sigma$}2 states of HF+. Comparison is made to the predictions of the Born approximation. The magnetic selection rule (j,mj{\textrightarrow}j,-mj) is strongly violated in the j=32 state and less strongly violated in the j=12 state. It is concluded that the important region of interaction for the j=12{\textrightarrow}j=32 transition is at short-to-intermediate distances where accurate molecular potentials are required and close-coupling effects are dominant.},
+  abstract = {The results of a close-coupling calculation of the fine-structure transitions (j,mj{$\rightarrow$}j{$\prime$},m{$\prime$}j) are presented for collisions between photons and F(Pj,mj2). The theory is formulated in the perturbed-stationary-state approximation using accurate molecular wave functions for the ground II2 and {$\Sigma$}2 states of HF+. Comparison is made to the predictions of the Born approximation. The magnetic selection rule (j,mj{$\rightarrow$}j,-mj) is strongly violated in the j=32 state and less strongly violated in the j=12 state. It is concluded that the important region of interaction for the j=12{$\rightarrow$}j=32 transition is at short-to-intermediate distances where accurate molecular potentials are required and close-coupling effects are dominant.},
   title = {Molecular {{Theory}} of {{Atomic Collisions}}: {{Calculated Cross Sections}} for ${\mathrm{H}}^{+\}}+\mathrm{F}(^{2}P)$}
 }