a few more (rare!) bug fixes tickled by Loa/Y3 processing

[moustakas]

Companion PR to #206. Will retag 3.1.2 after this is merged.

[coveralls]

Pull Request Test Coverage Report for Build 12673689807

Details

• 6 of 10 (60.0%) changed or added relevant lines in 2 files are covered.
• 2 unchanged lines in 2 files lost coverage.
• Overall coverage increased (+0.009%) to 49.623%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
py/fastspecfit/emlines.py	0	2	0.0%
py/fastspecfit/linemasker.py	6	8	75.0%

Files with Coverage Reduction	New Missed Lines	%
py/fastspecfit/linemasker.py	1	61.27%
py/fastspecfit/emlines.py	1	79.95%

Totals
Change from base Build 12658633517:	0.009%
Covered Lines:	3221
Relevant Lines:	6491

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💛 - Coveralls