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-rw-r--r--src/strings/index.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/src/strings/index.c b/src/strings/index.c
index 2f46d30..332811d 100644
--- a/src/strings/index.c
+++ b/src/strings/index.c
@@ -24,6 +24,8 @@
* This function is identical to `strchr`.
*
* This is a deprecated BSD extension.
+ *
+ * @etymology (Index) of character.
*/
char* (index)(const char* string, int c)
{