Compilare: main.cpp: In function 'std::ostream& operator<<(std::ostream&, const T&)': main.cpp:24:9: warning: this 'if' clause does not guard... [-Wmisleading-indentation] 24 | if(f) os << ", "; f = true; | ^~ main.cpp:24:27: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'if' 24 | if(f) os << ", "; f = true; | ^