docs: improve godocs formatting

Signed-off-by: Ron Evans <ron@hybridgroup.com>

drivers.go

@@ -3,35 +3,35 @@
 //
 // Here is an example in TinyGo that uses the BMP180 digital barometer:
 //
-// 		package main
+// 	package main
 //
-// 		import (
-//     		"time"
-//     		"machine"
+// 	import (
+//		"time"
+//     	"machine"
 //
-//     		"github.com/tinygo-org/drivers/bmp180"
-// 		)
+//     	"github.com/tinygo-org/drivers/bmp180"
+// 	)
 //
-// 		func main() {
-//			machine.I2C0.Configure(machine.I2CConfig{})
-//			sensor := bmp180.New(machine.I2C0)
-//			sensor.Configure()
+// 	func main() {
+//		machine.I2C0.Configure(machine.I2CConfig{})
+//		sensor := bmp180.New(machine.I2C0)
+//		sensor.Configure()
 //
-// 			connected := sensor.Connected()
-// 			if !connected {
-//				println("BMP180 not detected")
-//				return
-//			}
-//     		println("BMP180 detected")
+// 		connected := sensor.Connected()
+// 		if !connected {
+//			println("BMP180 not detected")
+//			return
+//		}
+//		println("BMP180 detected")
 //
-//			for {
-//				temp, _ := sensor.Temperature()
-//				println("Temperature:", float32(temp)/1000, "ºC")
+//		for {
+//			temp, _ := sensor.Temperature()
+//			println("Temperature:", float32(temp)/1000, "ºC")
 //
-//				pressure, _ := sensor.Pressure()
-//				println("Pressure", float32(pressure)/100000, "hPa")
+//			pressure, _ := sensor.Pressure()
+//			println("Pressure", float32(pressure)/100000, "hPa")
 //
-//				time.Sleep(2 * time.Second)
+//			time.Sleep(2 * time.Second)
 //			}
 //		}
 //