[demo/PATCH 1/3] string-list: Document STRING_LIST_INIT_* and string_list_init()

[Jonathan Nieder <jrnieder@gmail.com>]

Clarify the modern ways to initialize a string_list.  Text roughly
based on the analogous passage from api-strbuf.txt.

Signed-off-by: Jonathan Nieder <jrnieder@gmail.com>
---
 Documentation/technical/api-string-list.txt |   18 +++++++++++-------
 1 files changed, 11 insertions(+), 7 deletions(-)

diff --git a/Documentation/technical/api-string-list.txt b/Documentation/technical/api-string-list.txt
index 3f575bd..0f0e579 100644
--- a/Documentation/technical/api-string-list.txt
+++ b/Documentation/technical/api-string-list.txt
@@ -9,12 +9,17 @@ because it is not specific to paths.
 
 The caller:
 
-. Allocates and clears a `struct string_list` variable.
+. Allocates a `struct string_list` variable
 
-. Initializes the members. You might want to set the flag `strdup_strings`
-  if the strings should be strdup()ed. For example, this is necessary
-  when you add something like git_path("..."), since that function returns
-  a static buffer that will change with the next call to git_path().
+. Initializes the members. A string_list has to be initialized by
+  `string_list_init()` or by `= STRING_LIST_INIT_DUP` or
+  `= STRING_LIST_INIT_NODUP` before it can be used.
++
+Strings in lists initialized with the _DUP variant will be
+automatically strdup()ed on insertion and free()ed on removal.
+For example, this is necessary when you add something like
+git_path("..."), since that function returns a static buffer
+that will change with the next call to git_path().
 +
 If you need something advanced, you can manually malloc() the `items`
 member (you need this if you add things later) and you should set the
@@ -34,10 +39,9 @@ member (you need this if you add things later) and you should set the
 Example:
 
 ----
-struct string_list list;
+struct string_list list STRING_LIST_INIT_NODUP;
 int i;
 
-memset(&list, 0, sizeof(struct string_list));
 string_list_append(&list, "foo");
 string_list_append(&list, "bar");
 for (i = 0; i < list.nr; i++)
-- 
1.7.2.3