elasticsearch/elasticsearch — pull request #6021 by alexksikes (2014-05-02 14:01:32+00:00)
Title: Fix behavior on default boost factor for More Like This.

A boost terms factor of 1.0 is not the same as no boosting of terms.
The desired behavior is to deactivate boosting by default. If the user
specifies any value other than 0, then boosting is activated.