Fixes #425: symbols and emojis no longer considered word characters when spellchecking

src/source_spellcheck.cc

@@ -494,6 +494,8 @@ bool Source::SpellCheckView::is_word_iter(const Gtk::TextIter &iter) {
     ++backslash_count;
   if(backslash_count % 2 == 1)
     return false;
+  if(*iter >= 0x2030) // Symbols and emojis
+    return false;
   if(((*iter >= 'A' && *iter <= 'Z') || (*iter >= 'a' && *iter <= 'z') || *iter >= 128))
     return true;
   if(*iter == '\'')