[gcalctool] Add translator comment for " in "

[Robert Ancell <rancell src gnome org>]

commit dc07a922be118a80e51737c9d7cef215e4b4cd0f
Author: Robert Ancell <robert ancell canonical com>
Date:   Tue Jan 25 12:10:55 2011 +1000

    Add translator comment for " in "

 src/math-converter.c |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/src/math-converter.c b/src/math-converter.c
index 7561d1f..219c69c 100644
--- a/src/math-converter.c
+++ b/src/math-converter.c
@@ -465,7 +465,8 @@ math_converter_init(MathConverter *converter)
     gtk_widget_show(converter->priv->from_combo);
     gtk_box_pack_start(GTK_BOX(hbox), converter->priv->from_combo, FALSE, TRUE, 0);
 
-    label = gtk_label_new(_(" in "));
+    label = gtk_label_new(/* Label that is displayed between the two conversion combo boxes, e.g. "[degrees] in [radians]" */
+                          _(" in "));
     gtk_widget_show(label);
     gtk_box_pack_start(GTK_BOX(hbox), label, FALSE, TRUE, 0);