openwebwork/pg — pull request #13 by dpvc (2013-03-20 17:27:47+00:00)
Title: Make vectors use the context's i,j,k values to obtian TeX and string values

This was done for non-formulas (but not as well as it could be), but needed to be done for vector-valued formulas when the formulas needed to be represented in ijk notation (but were originally specified in vector coordinate notation).