vim-patch:8.1.1838: there is :spellwrong and :spellgood but not :spellrare

Problem:    There is :spellwrong and :spellgood but not :spellrare.
Solution:   Add :spellrare. (Martin Tournoij, closes vim/vim#4291)
https://github.com/vim/vim/commit/08cc374dabd2a02785129fa1c0100f7745c244ad

1 files changed, 17 insertions, 0 deletions

diff --git a/runtime/doc/spell.txt b/runtime/doc/spell.txt
index f722747ce9..3dce961c03 100644
--- a/runtime/doc/spell.txt
+++ b/runtime/doc/spell.txt
@@ -110,6 +110,23 @@ zuG			Undo |zW| and |zG|, remove the word from the internal
 :spellw[rong]! {word}	Add {word} as a wrong (bad) word to the internal word
 			list, like with |zW|.
 
+							*:spellr* *:spellrare*
+:[count]spellr[are] {word}
+			Add {word} as a rare word to 'spellfile', similar to
+			|zw|.  Without count the first name is used, with
+			a count of two the second entry, etc.
+
+			There are no normal mode commands to mark words as
+			rare as this is a fairly uncommon command and all
+			intuitive commands for this are already taken. If you
+			want you can add mappings with e.g.: >
+		nnoremap z?  :exe ':spellrare  ' . expand('<cWORD>')<CR>
+		nnoremap z/  :exe ':spellrare! ' . expand('<cWORD>')<CR>
+<			|:spellundo|, |zuw|, or |zuW| can be used to undo this.
+
+:spellr[rare]! {word}	Add {word} as a rare word to the internal word
+			list, similar to |zW|.
+
 :[count]spellu[ndo] {word}				*:spellu* *:spellundo*
 			Like |zuw|.  [count] used as with |:spellgood|.