Sync SDL3 wiki -> header

[ci skip]

docs/INTRO-emscripten.md

@@ -22,7 +22,7 @@ set(CMAKE_LIBRARY_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/$<CONFIGURATION>")
 # This assumes the SDL source is available in vendored/SDL
 add_subdirectory(vendored/SDL EXCLUDE_FROM_ALL)
 
-# on Web targets, we need CMake to generate a HTML webpage. 
+# on Web targets, we need CMake to generate a HTML webpage.
 if(EMSCRIPTEN)
   set(CMAKE_EXECUTABLE_SUFFIX ".html" CACHE INTERNAL "")
 endif()