Update change log for GitHub pull requests
Theorem SSS, proof, "also a vector space" (Jenna Fontaine)
LaTeX/XML formatting in Exercise VS.T10 (Chris Spalding)
Sage SUTH0, "row space of a matrix by the rows" (Jenna Fontaine)
Theorem CRN, proof, "Theorem BNS provides a basis" (Jenna Fontaine)
Theorem CRN, proof, "column without a leading 1" (Jenna Fontaine)
Subsection PD.GT, "the construction of a basis" (Jenna Fontaine)
Sage DMS, double "we" (Michael DuBois)
Clarified lead-in to Theorem PSSD (Michael DuBois)
LaTeX/XML formatting in Solution LISS.C21 (Chris Spalding, Paul Makl)
Problem PD.T05, added missing "for" (Jenna Fontaine)
Exercise PD.T33, "set is basis" to "set is a basis" (Jenna Fontaine)
Exercise PD.T33, remove extra "to" (Jenna Fontaine)
Theorem SSLD, fixed bolding on vector subscript (Chris Spalding)
Theorem DRMM, space needed between two words (Anna Dovzhik)