Doxygen tutorials: warnings cleared

doc/tutorials/introduction/linux_install/linux_install.markdown

@@ -127,10 +127,9 @@ Building OpenCV from Source Using CMake
     @code{.bash}
     <cmake_build_dir>/bin/opencv_test_core
     @endcode
+
 @note
    If the size of the created library is a critical issue (like in case of an Android build) you
     can use the install/strip command to get the smallest size as possible. The *stripped* version
     appears to be twice as small. However, we do not recommend using this unless those extra
     megabytes do really matter.
-
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