fix preprocessor bug: in the creation of the static model copy over equation tags

(cherry picked from commit fd99f4fe)

fix preprocessor bug: in the creation of the static model copy over equation tags
6e667c8f · Houtan Bastani · 8b2b3a48 · d45220fa · da4ca9e3 · d45220fa
Verified Commit 6e667c8f authored Jan 6, 2020 by Houtan Bastani
--- a/preprocessor @ d45220fa
+++ b/preprocessor @ d45220fa
-Subproject commit da4ca9e32386618487a86ba8429cc0f9a26c9629
+Subproject commit d45220fa5e6f3b79e549253aca8746ed5e3f955e