wrapped up lines and some minor corrections

src/mlpack/core/data/load_arff_impl.hpp

@@ -29,10 +29,6 @@ void LoadARFF(const std::string& filename,
   // First, open the file.
   std::ifstream ifs;
   ifs.open(filename, std::ios::in | std::ios::binary);
-  if (!ifs.is_open())
-  {
-    Log::Fatal << "Cannot open file '" << filename << "'. " << std::endl;
-  }
 
   // if file is not open throw an error (file not found).
   if (!ifs.is_open())

src/mlpack/core/data/one_hot_encoding.hpp

@@ -2,8 +2,7 @@
  * @file one_hot_encoding.hpp
  * @author Jeffin Sam
  *
- * One hot encoding functions
- * The purpose of this function is to convert
+ * One hot encoding functions .The purpose of this function is to convert
  * categorical variables as binary vectors.
  *
  * mlpack is free software; you may redistribute it and/or modify it under the
@@ -33,7 +32,6 @@ template<typename eT, typename RowType>
 void OneHotEncoding(const RowType& labelsIn,
                      arma::Mat<eT>& output);
 
-
 } // namespace data
 } // namespace mlpack
 

src/mlpack/tests/load_save_test.cpp

@@ -920,7 +920,7 @@ BOOST_AUTO_TEST_CASE(OneHotEncodingTest)
            "1 0;"
            "0 1;"
            "1 0;";
-// output matrix
+// Output matrix to save onehotencoding results.
   arma::Mat<size_t> output;
   arma::irowvec labels("-1 1 -1 -1 -1 -1 1 -1");
   data::OneHotEncoding(labels, output);