Improve TeXForm

[mmatera]

• Improve conversion from RowBox of function call and parenthesized form to LaTeX :
  • Use \left \right when the embraced expression does not contain ^, _ or \.
  • Improve the formatting of some bracket characters, like '<|' and '|>'.
• fix typo in documentation.

[rocky]

This is extremely fragile and myopic. Is there a more general principle underlying this?

I think the situation is that boxes should be noting whether their bounding box is strictly one-dimensional linear or can expand into the two-dimensional space. And that is what dictates whether \left and `\right' are needed.

[mmatera]

One way to do it better would be to add an attribute to each BoxExpression giving information about if the expression is one-dimensional. I didn´t do that because

1. most of the cases are properly covered with this
2. the cases which are not covered (expressions with escaped operators) still give expressions that compile in LaTeX
3. It is not too hard to change the condition to something more robust, but it requires more changes here and there.
   For the last point I can do a proposal on the top of this, to make it easy to review.

[rocky]

One way to do it better would be to add an attribute to each BoxExpression giving information about if the expression is one-dimensional.

That would be fine.

I didn´t do that because...

The problem is that this represents thinking about the situation in fundamentally the wrong way. And this has to be undone later. Better, in my opinion, is not to start down the hacky path. We've seen that before.

Keeping this around as a draft so that the output changes can be compared against is a good idea, though.

[mmatera]

#1664 can be used instead of checking for characters in the encoded inner LaTeX expression.

[mmatera]

This should be fixed now...