all: format code according to Go 1.19 rules

Go 1.19 started reformatting code in a way that makes it more obvious
how it will be rendered on pkg.go.dev. It gets it almost right, but not
entirely. Therefore, I had to modify some of the comments so that they
are formatted correctly.

src/runtime/runtime_esp8266.go

@@ -33,6 +33,7 @@ func buffered() int {
 // Write to the internal control bus (using I2C?).
 // Signature found here:
 // https://github.com/espressif/ESP8266_RTOS_SDK/blob/14171de0/components/esp8266/include/esp8266/rom_functions.h#L54
+//
 //export rom_i2c_writeReg
 func rom_i2c_writeReg(block, host_id, reg_add, data uint8)