Update

snippets/latex-mode/matrix.yasnippet

@@ -0,0 +1,7 @@
+# -*- mode: snippet -*-
+# contributor: Song Qiang <tsiangsung@gmail.com>
+# key: matrix
+# group: math
+# name: \begin{matrix} ... \end{}
+# --
+\begin{${1:$$(yas/choose-value '("pmatrix" "bmatrix" "Bmatrix" "vmatrix" "Vmatrix" "smallmatrix"))}} $0 \end{$1}