anchor.diff:  Generating Source
   ^^^^^^^^^^^^^^^^^
   
  -The protobuf CMake package, includes a number of helper functions to make the
  +The protobuf CMake package includes a number of helper functions to make the
   code generation easier. In this example we are generating C++ source and use
   the following code:
   
  
positive.code:     main.cpp
      ${PROTO_SRCS}
      ${PROTO_HDRS})
  ---
  
  This will cause the protobuf compiler to be called when you call `make` on that
  executables target.
  
negative.code: 
  This can be installed on Ubuntu using
  
  [source,bash]
  ----
  sudo apt-get install protobuf-compiler sudo apt-get install protobuf-compiler
  ----
  
  [[concepts]]
  Concepts
  