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string-list: document that string_list_insert() inserts unique strings

Signed-off-by: Heiko Voigt <hvoigt@hvoigt.net>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
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1 parent 8ced9c9 commit b8939b2b3abaa99c18bf57251cd2828b89ac38c5 Heiko Voigt committed with gitster
Showing with 3 additions and 1 deletion.
  1. +3 −1 Documentation/technical/api-string-list.txt
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4 Documentation/technical/api-string-list.txt
@@ -83,7 +83,9 @@ Functions
Insert a new element to the string_list. The returned pointer can be
handy if you want to write something to the `util` pointer of the
- string_list_item containing the just added string.
+ string_list_item containing the just added string. If the given
+ string already exists the insertion will be skipped and the
+ pointer to the existing item returned.
+
Since this function uses xrealloc() (which die()s if it fails) if the
list needs to grow, it is safe not to check the pointer. I.e. you may

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