foo.cc: In function 'bool isprime(int)':
foo.cc:6:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
    6 |     for(int i=2;i*i<=x;i++)
      |     ^~~
foo.cc:9:9: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
    9 |         return 1;
      |         ^~~~~~

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