[folks] Fix typo in InteractionDetails comment

[Siegfried-Angel Gevatter Pujals <sgevatter src gnome org>]

commit b5eb514338764fdb6f1d206a08b3f2e13d62f3e2
Author: Siegfried-Angel Gevatter Pujals <rainct ubuntu com>
Date:   Tue Jun 5 10:46:31 2012 +0200

    Fix typo in InteractionDetails comment

 folks/interaction-details.vala |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/folks/interaction-details.vala b/folks/interaction-details.vala
index 0bf710a..90e5016 100644
--- a/folks/interaction-details.vala
+++ b/folks/interaction-details.vala
@@ -22,9 +22,9 @@ using GLib;
 
 /**
  * Object representing interaction details for an Individual or Persona.
- * Interaction details are the number of call or IM interactions with the a
+ * Interaction details are the number of calls or IM interactions with
  * a { link Persona} or an { link Individual} as well as the the datetime of
- * the last call and im interaction.
+ * the last call and IM interaction.
  *
  * @since UNRELEASED
  */