patch 8.1.1865: spellrare and spellrepall in the wrong order

Problem:    Spellrare and spellrepall in the wrong order.
Solution:   Put spellrare below spellrepall. (closes #4820)
diff --git a/runtime/doc/spell.txt b/runtime/doc/spell.txt
index ff6feb6..540b836 100644
--- a/runtime/doc/spell.txt
+++ b/runtime/doc/spell.txt
@@ -121,7 +121,7 @@
 :spellw[rong]! {word}	Add {word} as a wrong (bad) word to the internal word
 			list, like with |zW|.
 
-							*:spellr* *:spellrare*
+							*:spellra* *:spellrare*
 :[count]spellr[are] {word}
 			Add {word} as a rare word to 'spellfile', similar to
 			|zw|.  Without count the first name is used, with