Merge pull request #875 from Krafting/patch-1

Author: ronso0

source/chapters/appendix/mixxx_controls.rst

@@ -609,7 +609,7 @@ Any control listed above for :mixxx:cogroupref:`[ChannelN]` will work for a samp
                    [PreviewDeckN],beat_distance
                    [SamplerN],beat_distance
 
-   Outputs the relative position of the play marker in the section between the the previous and next beat marker.
+   Outputs the relative position of the play marker in the section between the previous and next beat marker.
 
    :range: 0.0 - 1.0, real-valued
    :feedback: None