fix typos

googletest/test/gtest_test_utils.py

@@ -215,10 +215,10 @@ class Subprocess:
     Returns:
       An object that represents outcome of the executed process. It has the
       following attributes:
-        terminated_by_signal   True iff the child process has been terminated
+        terminated_by_signal   True if the child process has been terminated
                                by a signal.
         signal                 Sygnal that terminated the child process.
-        exited                 True iff the child process exited normally.
+        exited                 True if the child process exited normally.
         exit_code              The code with which the child process exited.
         output                 Child process's stdout and stderr output
                                combined in a string.

googletest/test/gtest_unittest.cc

@@ -2167,12 +2167,12 @@ static Environment* record_property_env GTEST_ATTRIBUTE_UNUSED_ =
 
 // First, some predicates and predicate-formatters needed by the tests.
 
-// Returns true iff the argument is an even number.
+// Returns true if the argument is an even number.
 bool IsEven(int n) {
   return (n % 2) == 0;
 }
 
-// A functor that returns true iff the argument is an even number.
+// A functor that returns true if the argument is an even number.
 struct IsEvenFunctor {
   bool operator()(int n) { return IsEven(n); }
 };
@@ -2216,12 +2216,12 @@ struct AssertIsEvenFunctor {
   }
 };
 
-// Returns true iff the sum of the arguments is an even number.
+// Returns true if the sum of the arguments is an even number.
 bool SumIsEven2(int n1, int n2) {
   return IsEven(n1 + n2);
 }
 
-// A functor that returns true iff the sum of the arguments is an even
+// A functor that returns true if the sum of the arguments is an even
 // number.
 struct SumIsEven3Functor {
   bool operator()(int n1, int n2, int n3) {