De-bloat SVGPathStringBuilder

Source/wtf/text/StringBuilderTest.cpp

Index: Source/wtf/text/StringBuilderTest.cpp
diff --git a/Source/wtf/text/StringBuilderTest.cpp b/Source/wtf/text/StringBuilderTest.cpp
index cbeb4464e51daa4bb4aa2130a3ef74e668c35b8e..3856f35d4521484a03c65f9bb05ec9c8a10f23d5 100644
--- a/Source/wtf/text/StringBuilderTest.cpp
+++ b/Source/wtf/text/StringBuilderTest.cpp
@@ -35,6 +35,7 @@
 #include "wtf/text/CString.h"
 #include "wtf/text/StringBuilder.h"
 #include "wtf/text/WTFString.h"
+#include "wtf/unicode/CharacterNames.h"
 #include <gtest/gtest.h>
 
 namespace WTF {
@@ -316,4 +317,16 @@ TEST(StringBuilderTest, Substring)
     }
 }
 
+TEST(StringBuilderTest, AppendNumberDoubleUChar)
+{
+    const double someNumber = 1.2345;
+    StringBuilder reference;
+    reference.append(replacementCharacter); // Make it UTF-16.
+    reference.append(String::number(someNumber));
+    StringBuilder test;
+    test.append(replacementCharacter);
+    test.appendNumber(someNumber);
+    ASSERT_EQ(reference, test);
+}
+
 } // namespace