Searching from main search page prepends unrelated string to query

Created by: lguychard

Steps to reproduce:

1. visit sourcegraph.com/search
2. type any query (eg. repo:github.com/sourcegraph/sourcegraph) in the search field
3. submit query

Expected behavior:

Search is performed with the query you typed in.

Actual behavior:

,function () { [native code] } is prepended to the query