Public function to access the uplo for Symmetric/Hermitian

[jishnub]

This lets one access the uplo field of a Symmetric/Hermitian matrix without accessing the internal fields of the struct.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.89%. Comparing base (98723df) to head (456d440).
⚠️ Report is 7 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #1440   +/-   ##
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  Coverage   93.89%   93.89%           
=======================================
  Files          34       34           
  Lines       15920    15922    +2     
=======================================
+ Hits        14948    14950    +2     
  Misses        972      972           

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[araujoms]

Any particular reason why you're returning a Symbol instead of a Char?

[jishnub]

Mainly because this matches what the constructor accepts. I'm ok with either choice.

[mikmoore]

Maybe add Bidiagonal to the list. Any others?

[tpapp]

Clarify what the symbols can be.

[tpapp]

LGTM, thanks!

[stevengj]

The new docstring should be added to https://github.com/JuliaLang/LinearAlgebra.jl/blob/master/docs/src/index.md (and potentially linked from elsewhere in the doc)? Maybe should also be linked from the docstrings for Symmetric etc?