[libc] [llvm] [libc][math] Refactor log_bf16 to Header (PR #186618)

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``````````bash
git-clang-format --diff origin/main HEAD --extensions cpp,h -- libc/shared/math/log_bf16.h libc/src/__support/math/log_bf16.h libc/shared/math.h libc/src/math/generic/log_bf16.cpp libc/test/shared/shared_math_test.cpp --diff_from_common_commit
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``````````diff
diff --git a/libc/src/__support/math/log_bf16.h b/libc/src/__support/math/log_bf16.h
index 757507977..d4ab6b6af 100644
--- a/libc/src/__support/math/log_bf16.h
+++ b/libc/src/__support/math/log_bf16.h
@@ -134,8 +134,8 @@ LIBC_INLINE bfloat16 log_bf16(bfloat16 x) {
   // Get unbiased exponent
   e += x_u >> FPBits::FRACTION_LEN;
 
-  return fputil::cast<bfloat16>(
-      fputil::multiply_add(static_cast<float>(e), BF16_LOGF_2, LOG_1_PLUS_M[m]));
+  return fputil::cast<bfloat16>(fputil::multiply_add(
+      static_cast<float>(e), BF16_LOGF_2, LOG_1_PLUS_M[m]));
 }
 
 } // namespace math

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https://github.com/llvm/llvm-project/pull/186618