[postgis-tickets] [PostGIS] #5434: Doc build fails on first run when using Unicode symbol entities

[PostGIS]

#5434: Doc build fails on first run when using Unicode symbol entities
---------------------------+---------------------------
 Reporter:  mdavis         |      Owner:  robe
     Type:  defect         |     Status:  new
 Priority:  medium         |  Milestone:  PostGIS 3.3.4
Component:  documentation  |    Version:  3.3.x
 Keywords:                 |
---------------------------+---------------------------
 The goal is to use Unicode symbols (specifically, in
 `reference_relationship.xml':
 {{{
 ST_Crosses(A, B) ⇔ (dim( I(A) ∩ I(B) ) < max( dim(I(A), I(B)
 ))) ∧ (a ∩ b ≠ a) ∧ (a ∩ b ≠ b)
 }}}

 On a clean install (running) `autogen` and then `configure`) the doc build
 fails:
 {{{
 make chunked-html

 reference_relationship.xml:624: parser error : Entity 'hArr' not defined
 }}}

 If I remove the symbols, `make chunked-html` again, add the symbols back,
 and make again - it works.
-- 
Ticket URL: <https://trac.osgeo.org/postgis/ticket/5434>
PostGIS <http://trac.osgeo.org/postgis/>
The PostGIS Trac is used for bug, enhancement & task tracking, a user and developer wiki, and a view into the subversion code repository of PostGIS project.