Doc search: update to version 2.15, use it in the "site:" part

From: Pavel Roskin <address@hidden>

site:lilypond.org/doc/v2.15 means that we want to look only under that
directory.  Leading plus doesn't force the exact search anymore.
---

 Documentation/search-box.ihtml |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)


diff --git a/Documentation/search-box.ihtml b/Documentation/search-box.ihtml
index d789109..1c9ceb4 100644
--- a/Documentation/search-box.ihtml
+++ b/Documentation/search-box.ihtml
@@ -1,11 +1,11 @@
 <form action="http://google.com/search"
       method="get"
       name="search"
-      onSubmit="search.q.value='site:lilypond.org +v2.14 '
+      onSubmit="search.q.value='site:lilypond.org/doc/v2.15 '
 		+ search.brute_query.value"
-      onMouseMove="search.q.value='site:lilypond.org +v2.14 '
+      onMouseMove="search.q.value='site:lilypond.org/doc/v2.15 '
 		   + search.brute_query.value"
-      onKeyUp="search.q.value='site:lilypond.org +v2.14 '
+      onKeyUp="search.q.value='site:lilypond.org/doc/v2.15 '
 	       + search.brute_query.value">
   <input type="hidden" name="btnG" value="Google Search">
   <input type="text" name="brute_query" onfocus="this.value=''" value="Search">