support bazel complie this project and format code.

learn_class/modern_cpp_30/SFINAE/sfinae paper/p2SFINAE.cpp

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+//
+// Created by light on 20-1-6.
+//
+
+
+// The compiler will be really unhappy when it will later discover the call to hahahaICrash.
+// 当以后发现对hahahaICrash的调用时，编译器将非常不满意。
+template <typename T> void f(T t) { t.hahahaICrash(); }
+void f(...) { } // The sink-hole wasn't even considered.
+
+int main() {
+    f(1);
+}