message: Fix line numbers in tutorial documention
  Reviewers: davidn
diff: @@ -74,8 +74,8 @@ We begin with the most humble of aspirations: the ability to add.
  :linenos:
  Let's review the various key sections of the code as they are presented. In
  -lines *1-4* are the basic import statements, two of which pertain to the IPU
  -specifically. Line *3* imports the *IPU* API, which will be the main interface
  +lines *1-5* are the basic import statements, two of which pertain to the IPU
  +specifically. Line *4* imports the *IPU* API, which will be the main interface
  to set configuration options for the IPU session run. *ipu_scope* is a helper
  function that insures the device and resource scopes are set, (i.e. the hardware
  is properly initiated when called by the script).
  @@ -274,7 +274,7 @@ script to go through the IPUs currently available to the host, determine which
  are being utilised and which are free, and then subscribe to those IPUs that are
  available.
  -In lines *31-39*, the standard sum graph is defined, (with the addition of one
  +In lines *29-37*, the standard sum graph is defined, (with the addition of one
  more sum for shard *2*), and now each portion of the sum is performed on a
  distinct shard, using
  @@ -284,7 +284,7 @@ distinct shard, using
  As a result, shards *0* through *2* perform independent tensor sums, while shard
  -*3* performs an accumulated sum from the other respective shards. In line *44*
  +*3* performs an accumulated sum from the other respective shards. In line *42*
  we are using *xla.compile* to parse the graph, but it is noted that sharding can
  be performed without running through the *XLA* library.
  