[llvm] [ValueTracking][KnownFPClass] cover known no-infinity cases for powi (PR #191736)

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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp -- llvm/lib/Analysis/ValueTracking.cpp llvm/lib/Support/KnownFPClass.cpp llvm/unittests/Analysis/ValueTrackingTest.cpp --diff_from_common_commit
``````````

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View the diff from clang-format here.
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``````````diff
diff --git a/llvm/unittests/Analysis/ValueTrackingTest.cpp b/llvm/unittests/Analysis/ValueTrackingTest.cpp
index 4034e2982..1d3c9a272 100644
--- a/llvm/unittests/Analysis/ValueTrackingTest.cpp
+++ b/llvm/unittests/Analysis/ValueTrackingTest.cpp
@@ -1945,7 +1945,7 @@ TEST_F(ComputeKnownFPClassTest, PowiInfFirst) {
     EXPECT_EQ(Expected, Known.isKnownNeverInfinity());
   };
 
-  ExpectKnownNeverInf(A,  true);
+  ExpectKnownNeverInf(A, true);
   ExpectKnownNeverInf(A2, false);
   ExpectKnownNeverInf(A3, true);
   ExpectKnownNeverInf(A4, true);

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https://github.com/llvm/llvm-project/pull/191736