Make corpus alignment exceptions more generic

[pmachapman]

Part of sillsdev/machine.py#283

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This change is 

[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 8 lines in your changes missing coverage. Please review.
✅ Project coverage is 73.14%. Comparing base (f6bae46) to head (bdd2182).

Files with missing lines	Patch %	Lines
src/SIL.Machine/Corpora/CorporaExtensions.cs	0.00%	4 Missing ⚠️
src/SIL.Machine/Corpora/NParallelTextCorpus.cs	0.00%	3 Missing ⚠️
src/SIL.Machine/Corpora/ParallelTextCorpus.cs	0.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master     #420      +/-   ##
==========================================
+ Coverage   73.13%   73.14%   +0.01%     
==========================================
  Files         440      439       -1     
  Lines       36822    36816       -6     
  Branches     5061     5061              
==========================================
  Hits        26930    26930              
+ Misses       8781     8775       -6     
  Partials     1111     1111              

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[Enkidu93]

@Enkidu93 reviewed 4 files and all commit messages, and made 1 comment.
Reviewable status: all files reviewed, 1 unresolved discussion (waiting on ddaspit and pmachapman).

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src/SIL.Machine/Corpora/CorporaExtensions.cs line 62 at r1 (raw file):

            where T : IRow =>
            new ArgumentException(
                $"Invalid format in {string.Join(", ", refs)}. Mismatched key formats. There may be an extraneous tab, missing ref, or inconsistent use of user-defined refs.",

I think we can make this even more generic. Something as simple as "Unable to align rows with refs: {refs}" would do. The main thing we want to capture with this exception are the refs that we were unable to align with. The details about tabs and user-defined refs is Serval-specific.

[ddaspit]

@ddaspit reviewed 4 files and all commit messages, and made 1 comment.
Reviewable status: all files reviewed, 2 unresolved discussions (waiting on pmachapman).

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src/SIL.Machine/Corpora/CorporaExtensions.cs line 61 at r1 (raw file):

        )
            where T : IRow =>
            new ArgumentException(

ArgumentException doesn't feel right to me, since the error is not caused by passing an incorrect argument to the called method. InvalidOperationException would probably be more appropriate.