Add SyntaxQ and add a new "String Tests" Section

[rocky]

• Add SyntaxQ[]
• Create "String Tests" section in the "Testing Expressions" Guide section
• Misc lint.
• move another eval function to mathics.eval

SyntaxQ[] is used in the PacletManager.

[axkr]

Typo: syntactically

[rocky]

Thanks! Should be fixed now.

BTW I don't know why this reminded me, but a long time ago I asked you in slack about packages that would be easy to get running. Your reply in slack history has been long removed. Do you remember what package or packages you mentioned?

[axkr]

BTW I don't know why this reminded me, but a long time ago I asked you in slack about packages that would be easy to get running. Your reply in slack history has been long removed. Do you remember what package or packages you mentioned?

I only documented this one in the Wiki:

• https://github.com/axkr/symja_android_library/wiki/context#wl-packages

[mmatera]

The only thing that I think is missing here is to include some tests for SyntaxQ

[rocky]

The only thing that I think is missing here is to include some tests for SyntaxQ

There is a doctest for True and False. If there are other kinds of tests you'd like to see, please suggest them.
We might add a note in the doc suggesting that this is how one can check the version level, since that's what it is used for in PacletManager.

Also, we probably have pretty extensive Syntax checks (or should add them elsewhere). Checking the scanner and parser here doesn't feel that right.

[mmatera]

The only thing that I think is missing here is to include some tests for SyntaxQ

There is a doctest for True and False. If there are other kinds of tests you'd like to see, please suggest them. We might add a note in the doc suggesting that this is how one can check the version level, since that's what it is used for in PacletManager.

Also, we probably have pretty extensive Syntax checks (or should add them elsewhere). Checking the scanner and parser here doesn't feel that right.

OK, in that case, let's add them in another round. Merge this when you feel it is ready.

[rocky]

There will indeed be more improvements down the line. We don't have SyntaxQ with a form. We don't have SyntaxLength implemented either. That tech-note class should be removed and the functions in that moved corresponding guide sections.

However, this allows us the possibility of running PacletManager which was the motivation for doing this.