Fix typo in Track Tuner documentation

Author: mfaggin

docs/basics-usage/HelperTasks.md

@@ -792,7 +792,7 @@ This is not relevant in Pb-Pb collisions.
 ```note
 * The `TrackTuner` allows also to smear the `q/pt` if only one between `updateCurvature` and `updateCurvatureIU` is `true`
 * By default, the variables `oneOverPtData` and `oneOverPtMC` are initialized to `-1`
-* If `(qOverPtMC < 0) || (qOverPtData < 0)`, the `q/pt` correction is done wuering the file from CCDB. Otherwise, the input values of `qOverPtMC` and `qOverPtData` are used to defined the factor `oneOverPtData/oneOverPtMC`, which is a constant factor flat in transverse momentum.
+* If at least one between`qOverPtMCq` and `OverPtData` is negative, the `q/pt` correction is done wuering the file from CCDB. Otherwise, the input values of `qOverPtMC` and `qOverPtData` are used to defined the factor `oneOverPtData/oneOverPtMC`, which is a constant factor flat in transverse momentum.
 ```
 The string `trackTunerParams` must follow the format: `<variable_name>=<value>|<variable_name>=<value>` (see the default configuration [here](https://github.com/AliceO2Group/O2Physics/blob/master/Common/TableProducer/trackPropagation.cxx#L62) as reference).