message: Fix clang.Dockerfile
diff: @@ -31,11 +31,11 @@ ENV CC clang
  ENV CXX clang++
  RUN ln -s /usr/bin/clang-9 /usr/bin/clang \
  && ln -s /usr/bin/clang++-9 /usr/bin/clang++ \
  - && ln -s /usr/bin/clang-format-9.0 /usr/bin/clang-format \
  - && ln -s /usr/bin/git-clang-format-9.0 /usr/bin/git-clang-format
  + && ln -s /usr/bin/clang-format-9 /usr/bin/clang-format \
  + && ln -s /usr/bin/git-clang-format-9 /usr/bin/git-clang-format
  RUN cd /opt \
  - && wget https://cmake.org/files/v3.15/cmake-3.15.2-Linux-x86_64.tar.gz \
  - && tar zxvf cmake-3.15.2-Linux-x86_64.tar.gz
  + && wget -nv https://cmake.org/files/v3.15/cmake-3.15.2-Linux-x86_64.tar.gz \
  + && tar zxf cmake-3.15.2-Linux-x86_64.tar.gz
  ENV PATH "/opt/cmake-3.15.2-Linux-x86_64/bin:$PATH"
  