symbols: don't encode vertical bars as nonexistent HTML entities.

Excerpt from https://www.lyx.org/trac/ticket/12221#comment:11

Created by lynx

diff --git a/lib/symbols b/lib/symbols
index f56c038fc4a1e4fcdb392ad394d4ab8d5593fa4b..af85929b9270780f0e9e1a509d55b76818a33d8d 100644 (file)
--- a/lib/symbols
+++ b/lib/symbols
@@ -374,8 +374,8 @@ sqsubseteq         cmsy        118   0 mathrel  ⊑        ⊑
 sqsupseteq         cmsy        119   0 mathrel  ⊒        ⊒
 parallel           cmsy        107   0 mathrel  ∥          ∥
 mid                cmsy        106 124 mathrel  ∣          ∣
-lvert              cmsy        106 124 mathrel  &lvert;         |        amsmath
-rvert              cmsy        106 124 mathrel  &rvert;         |        amsmath
+lvert              cmsy        106 124 mathrel  |               |        amsmath
+rvert              cmsy        106 124 mathrel  |               |        amsmath
 dashv              cmsy         97   0 mathrel  ⊣         ⊣
 vdash              cmsy         96   0 mathrel  ⊢         ⊢
 nearrow            cmsy         37   0 mathrel  ↗         ↗