Revert "more format cleanup"

This reverts commit 0430171a.

indra/llcommon/u64.cpp

@@ -66,15 +66,15 @@ std::string U64_to_str(U64 value)
 	
 	if (part1)
 	{
-		res = absl::StrFormat("%u%07u%07u",part1,part2,part3);
+		res = llformat("%u%07u%07u",part1,part2,part3);
 	}
 	else if (part2)
 	{
-		res = absl::StrFormat("%u%07u",part2,part3);
+		res = llformat("%u%07u",part2,part3);
 	}
 	else
 	{
-		res = absl::StrFormat("%u",part3);
+		res = llformat("%u",part3);	
 	}
 	return res;
 } 

indra/llui/lltexteditor.cpp

@@ -2671,7 +2671,14 @@ BOOL LLTextEditor::importBuffer(const char* buffer, S32 length )
 
 BOOL LLTextEditor::exportBuffer(std::string &buffer )
 {
-	buffer = absl::StrFormat("Linden text version 1\n{\nText length %d\n%s}\n", getLength(), getText());
+	std::ostringstream outstream(buffer);
+	
+	outstream << "Linden text version 1\n";
+	outstream << "{\n";
+
+	outstream << llformat("Text length %d\n", getLength() );
+	outstream << getText();
+	outstream << "}\n";
 
 	return TRUE;
 }