Fix example in comment
diff --git a/include/git2/ignore.h b/include/git2/ignore.h
index 964a108..e18615e 100644
--- a/include/git2/ignore.h
+++ b/include/git2/ignore.h
@@ -24,7 +24,7 @@ GIT_BEGIN_DECL
*
* Example usage:
*
- * error = git_ignore_add(myrepo, "*.c\ndir/\nFile with space\n");
+ * error = git_ignore_add_rule(myrepo, "*.c\ndir/\nFile with space\n");
*
* This would add three rules to the ignores.
*