fixed cpplint errors (#2971)

include/LightGBM/utils/openmp_wrapper.h

@@ -6,9 +6,10 @@
 #define LIGHTGBM_OPENMP_WRAPPER_H_
 #ifdef _OPENMP
 
-#include <omp.h>
 #include <LightGBM/utils/log.h>
 
+#include <omp.h>
+
 #include <exception>
 #include <memory>
 #include <mutex>

src/io/tree.cpp

@@ -71,7 +71,7 @@ int Tree::SplitCategorical(int leaf, int feature, int real_feature, const uint32
   int new_node_idx = num_leaves_ - 1;
   decision_type_[new_node_idx] = 0;
   SetDecisionType(&decision_type_[new_node_idx], true, kCategoricalMask);
-  SetMissingType(&decision_type_[new_node_idx], missing_type);  
+  SetMissingType(&decision_type_[new_node_idx], missing_type);
   threshold_in_bin_[new_node_idx] = num_cat_;
   threshold_[new_node_idx] = num_cat_;
   ++num_cat_;
@@ -335,7 +335,7 @@ std::string Tree::NumericalDecisionIfElse(int node) const {
   std::stringstream str_buf;
   uint8_t missing_type = GetMissingType(decision_type_[node]);
   bool default_left = GetDecisionType(decision_type_[node], kDefaultLeftMask);
-  if (missing_type == MissingType::None 
+  if (missing_type == MissingType::None
       || (missing_type == MissingType::Zero && default_left && kZeroThreshold < threshold_[node])) {
     str_buf << "if (fval <= " << threshold_[node] << ") {";
   } else if (missing_type == MissingType::Zero) {

src/lightgbm_R.cpp

@@ -9,6 +9,8 @@
 #include <LightGBM/utils/openmp_wrapper.h>
 #include <LightGBM/utils/text_reader.h>
 
+#include <R_ext/Rdynload.h>
+
 #include <string>
 #include <cstdio>
 #include <cstring>
@@ -16,8 +18,6 @@
 #include <utility>
 #include <vector>
 
-#include <R_ext/Rdynload.h>
-
 #define COL_MAJOR (0)
 
 #define R_API_BEGIN() \