Balance parentheses (#1731)

close-parens were missing

Author: SpencerGreene

source/docs/software/advanced-controls/controllers/combining-feedforward-feedback.rst

@@ -41,19 +41,19 @@ What might a more complete example of combined feedforward/PID control look like
 
     public void tankDriveWithFeedforwardPID(double leftVelocitySetpoint, double rightVelocitySetpoint) {
       leftMotor.setVoltage(feedforward.calculate(leftVelocitySetpoint)
-          + leftPID.calculate(leftEncoder.getRate(), leftVelocitySetpoint);
+          + leftPID.calculate(leftEncoder.getRate(), leftVelocitySetpoint));
       rightMotor.setVoltage(feedForward.calculate(rightVelocitySetpoint)
-          + rightPID.calculate(rightEncoder.getRate(), rightVelocitySetpoint);
+          + rightPID.calculate(rightEncoder.getRate(), rightVelocitySetpoint));
     }
 
   .. code-tab:: c++
 
     void TankDriveWithFeedforwardPID(units::meters_per_second_t leftVelocitySetpoint,
                                      units::meters_per_second_t rightVelocitySetpoint) {
       leftMotor.SetVoltage(feedforward.Calculate(leftVelocitySetpoint)
-          + leftPID.Calculate(leftEncoder.getRate(), leftVelocitySetpoint.value());
+          + leftPID.Calculate(leftEncoder.getRate(), leftVelocitySetpoint.value()));
       rightMotor.SetVoltage(feedforward.Calculate(rightVelocitySetpoint)
-          + rightPID.Calculate(rightEncoder.getRate(), rightVelocitySetpoint.value());
+          + rightPID.Calculate(rightEncoder.getRate(), rightVelocitySetpoint.value()));
     }
 
 Other mechanism types can be handled similarly.