comments: avoid using the gender of our users

We generally avoid specifying the gender of our users in order to be
more inclusive, but sometimes a few slip by due to habit.

Since by doing a little bit of rewording we can avoid this irrelevant
detail, let's do so.

Inspired-by: Derrick Stolee <dstolee@microsoft.com>
Helped-by: Ævar Arnfjörð Bjarmason <avarab@gmail.com>
Signed-off-by: Felipe Contreras <felipe.contreras@gmail.com>
Signed-off-by: Derrick Stolee <dstolee@microsoft.com>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
diff --git a/strbuf.h b/strbuf.h
index 223ee20..a86dcaa 100644
--- a/strbuf.h
+++ b/strbuf.h
@@ -337,8 +337,8 @@ const char *strbuf_join_argv(struct strbuf *buf, int argc,
  * placeholder is unknown, then the percent sign is copied, too.
  *
  * In order to facilitate caching and to make it possible to give
- * parameters to the callback, `strbuf_expand()` passes a context pointer,
- * which can be used by the programmer of the callback as she sees fit.
+ * parameters to the callback, `strbuf_expand()` passes a context
+ * pointer with any kind of data.
  */
 typedef size_t (*expand_fn_t) (struct strbuf *sb,
 			       const char *placeholder,