[src,doc] Fix several unrelated minor problems. Thanks: gaoxinglong

src/doc/dnn3_scripts_context.dox

@@ -49,7 +49,7 @@ namespace nnet3 {
    compute this output without seeing a range of input frames.  For example,
    it may be impossible to compute the output without seeing the range of
    't' values from t = 150 through t = 157.  In this case (glossing over details),
-   we'd say that the network has a \b left-context of 3 and a \b right-context of 4.
+   we'd say that the network has a \b left-context of 4 and a \b right-context of 3.
    The actual computation of the context is a bit more complex as it has to
    take into account special cases like where, say, the behavior for odd and
    even 't' values is different (c.f. Round() descriptors in

src/nnet3/nnet-optimize.cc

@@ -863,7 +863,7 @@ void FixGotoOutputReordering(const Nnet &nnet,
   FixGotoLabel(computation);  // make sure the destination label of the goto statement was
                               // correct.
   int32 goto_command_index = -1;
-  for (int32 c = computation->commands.size(); c >= 0; c--)
+  for (int32 c = computation->commands.size() - 1; c >= 0; c--)
     if (computation->commands[c].command_type == kGotoLabel)
       goto_command_index = c;
   KALDI_ASSERT(goto_command_index > 0);

src/nnet3/nnet-utils.h

@@ -81,7 +81,7 @@ std::string PrintVectorPerUpdatableComponent(const Nnet &nnet,
 
 /// This function returns true if the nnet has the following properties:
 ///  It has an output called "output" (other outputs are allowed but may be
-///          ignored).
+///  ignored).
 ///  It has an input called "input", and possibly an extra input called
 ///    "ivector", but no other inputs.
 ///  There are probably some other properties that we really ought to
@@ -160,8 +160,8 @@ void ConvertRepeatedToBlockAffine(Nnet *nnet);
 /// Info() function (we need this in the CTC code).
 std::string NnetInfo(const Nnet &nnet);
 
-/// This function sets the dropout proportion in all dropout component to
-/// dropout_proportion value.
+/// This function sets the dropout proportion in all dropout components to
+/// the value 'dropout_proportion'
 void SetDropoutProportion(BaseFloat dropout_proportion, Nnet *nnet);
 
 /// This function finds a list of components that are never used, and outputs