src/sage/docs/conf.py: Add more \DeclareUnicodeCharacter

Author: Matthias Koeppe

src/sage/docs/conf.py

@@ -431,8 +431,10 @@ def set_intersphinx_mappings(app, config):
     \DeclareUnicodeCharacter{22C0}{\ensuremath{\bigwedge}}
     \DeclareUnicodeCharacter{2192}{\ensuremath{\to}}
     \DeclareUnicodeCharacter{21A6}{\ensuremath{\mapsto}}
-    \DeclareUnicodeCharacter{211D}{\ensuremath{\mathbb{R}}}
     \DeclareUnicodeCharacter{2102}{\ensuremath{\mathbb{C}}}
+    \DeclareUnicodeCharacter{211A}{\ensuremath{\mathbb{Q}}}
+    \DeclareUnicodeCharacter{211D}{\ensuremath{\mathbb{R}}}
+    \DeclareUnicodeCharacter{2124}{\ensuremath{\mathbb{Z}}}
     \DeclareUnicodeCharacter{2202}{\ensuremath{\partial}}
 
     \DeclareUnicodeCharacter{2070}{\ensuremath{{}^0}}