Formatting & cleanup in PieChartRenderer. (#1060)
Formatting & cleanup in PieChartRenderer. (#1060)

Minor changes to spacing in PieChartRenderer.swift. Removed formatting
and use of "self." to match library style.

danielgindi/Charts,icecrystal23/ios-charts,icecrystal23/ios-charts,danielgindi/ios-charts,jjatie/Charts,icecrystal23/ios-charts,jum/Charts,danielgindi/ios-charts,MAARK/Charts,MAARK/Charts,jum/Charts,icecrystal23/ios-charts,MAARK/Charts,liuxuan30/ios-charts,jum/Charts,liuxuan30/ios-charts,jum/Charts,liuxuan30/ios-charts,liuxuan30/Charts,danielgindi/Charts,liuxuan30/Charts,MAARK/Charts,liuxuan30/ios-charts,danielgindi/Charts,jjatie/Charts,danielgindi/Charts,danielgindi/ios-charts,liuxuan30/Charts,liuxuan30/Charts,jjatie/Charts,danielgindi/ios-charts,jjatie/Charts