Use of backticks for math mode won't work with WW 2.19

[dlglin]

WeBWorK 2.19 no longer supports using backticks to display math formulas.

There are a number of problems in the Contrib/CCCS folder that do this, and will need to be updated to work with future versions of WeBWorK.

[gajennings]

Please explain what this means. It seems that PGML requires backticks to display latex typeset math expressions. (See https://webwork.maa.org/wiki/Introduction_to_PGML section 3.5 "math notation"). I can't believe they would disable that, especially as some on the webwork team have been promoting PGML.

[dlglin]

The issue is not with the bracket-backtick construction. That is still recommended. The problem is raw backticks. [` ... `] is fine. ` ... ` is what will break.

For example Contrib/CCCS/07.3/CCD_CCCS_Openstax_AlgTrig_AT-1-001-AS_7_3_6.pg has the following line in a PGML block:

`[$fun1]` and `[$fun2]`

Those type of things will need to be changed for 2.19.