Add back comment and fix whitespace (#28)

Author: jesserockz

CMakeLists.txt

@@ -1,11 +1,12 @@
 cmake_minimum_required(VERSION 3.15)
 
 if(ESP_PLATFORM)
-	idf_component_register(
+   # Build as an ESP-IDF component
+   idf_component_register(
       SRCS "src/improv.cpp"
       INCLUDE_DIRS "src"
    )
-	return()
+   return()
 endif()
 
 project(improv VERSION 1.2.5)