foo.cc: In function 'bool isprime(int)':
foo.cc:18:2: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
   18 |  for(int i=2;i*i<=x;i++)
      |  ^~~
foo.cc:21:3: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
   21 |   return 1;
      |   ^~~~~~

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