[gtk/gtk-4-4] entry: Clarify docs

[Matthias Clasen <matthiasc src gnome org>]

commit 1fa97e1808240b5350cc186e7b11535834175b8b
Author: Matthias Clasen <mclasen redhat com>
Date:   Tue Sep 28 15:40:41 2021 -0400

    entry: Clarify docs
    
    Mention that max length is in characters.

 gtk/gtkentry.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/gtk/gtkentry.c b/gtk/gtkentry.c
index e03127f134..2239d46cc5 100644
--- a/gtk/gtkentry.c
+++ b/gtk/gtkentry.c
@@ -2278,7 +2278,7 @@ gtk_entry_get_overwrite_mode (GtkEntry *entry)
  * Sets the maximum allowed length of the contents of the widget.
  *
  * If the current contents are longer than the given length, then
- * they will be truncated to fit.
+ * they will be truncated to fit. The length is is in characters.
  *
  * This is equivalent to getting @entry's `GtkEntryBuffer` and
  * calling [method@Gtk.EntryBuffer.set_max_length] on it.