Minor fix with list syntax

docs/en/modules/tsl2561.md

@@ -77,7 +77,8 @@ Initializes the device on pins sdapin & sclpin. Optionally also configures the d
     * `tsl2561.PACKAGE_T_FN_CL` (default when omitted)
 
 #### Returns
-`status` value indicating success or failure as explained below
+`status` value indicating success or failure as explained below:
+
 - `tsl2561.TSL2561_OK`
 - `tsl2561.TSL2561_ERROR_I2CINIT` can't initialize I2C bus
 - `tsl2561.TSL2561_ERROR_I2CBUSY` I2C bus busy
@@ -110,6 +111,7 @@ Sets the integration time and gain settings of the device. When `tls2561.init()`
 
 #### Returns
 `status` value indicating success or failure as explained below:
+
 - `tsl2561.TSL2561_OK`
 - `tsl2561.TSL2561_ERROR_I2CINIT` can't initialize I2C bus
 - `tsl2561.TSL2561_ERROR_I2CBUSY` I2C bus busy
@@ -126,4 +128,4 @@ if status == tsl2561.TSL2561_OK then
     lux = tsl2561.getlux()
     print("Illuminance: "..lux.." lx") 
 end
-```
+```