[ci][c++] fixed whitespace/indent_namespace errors from cpplint (#7056)

* dev

* dev

* dev

* dev

* dev

---------

Co-authored-by: James Lamb <[email protected]>

Author: StrikerRUS

.pre-commit-config.yaml

@@ -28,7 +28,7 @@ repos:
       - id: cpplint
         args:
           - --recursive
-          - --filter=-build/include_subdir,-build/header_guard,-whitespace/indent_namespace,-whitespace/line_length
+          - --filter=-build/include_subdir,-build/header_guard,-whitespace/line_length
   - repo: local
     hooks:
       - id: check-omp-pragmas

include/LightGBM/meta.h

@@ -83,7 +83,7 @@ const int kAlignedSize = 32;
 
 // Refer to https://docs.microsoft.com/en-us/cpp/error-messages/compiler-warnings/compiler-warning-level-4-c4127?view=vs-2019
 #ifdef _MSC_VER
-  #pragma warning(disable : 4127)
+#pragma warning(disable : 4127)
 #endif
 
 }  // namespace LightGBM