[FOLD] Address reviewer comments

src/ripple/basics/impl/IOUAmount.cpp

@@ -120,36 +120,34 @@ IOUAmount::operator+=(IOUAmount const& other)
     if (*stNumberSwitchover)
     {
         *this = IOUAmount{Number{*this} + Number{other}};
+        return *this;
     }
-    else
-    {
-        auto m = other.mantissa_;
-        auto e = other.exponent_;
-
-        while (exponent_ < e)
-        {
-            mantissa_ /= 10;
-            ++exponent_;
-        }
+    auto m = other.mantissa_;
+    auto e = other.exponent_;
 
-        while (e < exponent_)
-        {
-            m /= 10;
-            ++e;
-        }
+    while (exponent_ < e)
+    {
+        mantissa_ /= 10;
+        ++exponent_;
+    }
 
-        // This addition cannot overflow an std::int64_t but we may throw from
-        // normalize if the result isn't representable.
-        mantissa_ += m;
+    while (e < exponent_)
+    {
+        m /= 10;
+        ++e;
+    }
 
-        if (mantissa_ >= -10 && mantissa_ <= 10)
-        {
-            *this = beast::zero;
-            return *this;
-        }
+    // This addition cannot overflow an std::int64_t but we may throw from
+    // normalize if the result isn't representable.
+    mantissa_ += m;
 
-        normalize();
+    if (mantissa_ >= -10 && mantissa_ <= 10)
+    {
+        *this = beast::zero;
+        return *this;
     }
+
+    normalize();
     return *this;
 }