Change the latex printing of Mv to use aligned instead of align*

[eric-wieser]

The former can be used in math mode, but the latter is only legal in text mode. The sympy latex printer expects all results to be usable in math mode.

This resulted in a bug when attempting to use something like:

from IPython.display import Math
from sympy import latex
Math(latex((F.Fmt(3,'F'), F.Fmt(3,'F'))))

Before this change:

After this change:

Builds upon #379.

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Codecov Report

Merging #382 into master will increase coverage by 0.10%. The diff coverage is 80.00%.

@@            Coverage Diff             @@
##           master     #382      +/-   ##
==========================================
+ Coverage   77.52%   77.63%   +0.10%     
==========================================
  Files          16       16              
  Lines        4285     4256      -29     
==========================================
- Hits         3322     3304      -18     
+ Misses        963      952      -11     

Impacted Files	Coverage Δ
galgebra/lt.py	59.77% <50.00%> (+0.14%)	:arrow_up:
galgebra/printer.py	78.70% <88.88%> (+0.42%)	:arrow_up:
galgebra/mv.py	75.15% <100.00%> (ø)

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[eric-wieser]

Rebased. Notebooks need regenerating.

[eric-wieser]

Looks like I lost some cleanup in the rebase too