strip pdf off of end of DOIs

[GlazerMann]

Just the test right now

[codecov]

Codecov Report

Merging #523 into master will decrease coverage by 3.04%.
The diff coverage is 100%.

@@             Coverage Diff              @@
##             master     #523      +/-   ##
============================================
- Coverage     75.67%   72.63%   -3.05%     
  Complexity     1444     1444              
============================================
  Files             9        9              
  Lines          2471     2474       +3     
============================================
- Hits           1870     1797      -73     
- Misses          601      677      +76

Impacted Files	Coverage Δ	Complexity Δ
expandFns.php	95.16% <100%> (+0.11%)	0 <0> (ø)	⬇️
Template.php	79.53% <0%> (-4.24%)	1292% <0%> (ø)

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