[RISCV][NFC] use OS.indent() to replace spaces

Signed-off-by: Jerry Zhang Jian <[email protected]>

Author: jerryzj

llvm/utils/TableGen/RISCVTargetDefEmitter.cpp

@@ -36,7 +36,7 @@ static void printExtensionTable(raw_ostream &OS,
     if (R->getValueAsBit("Experimental") != Experimental)
       continue;
 
-    OS << "    {\"" << getExtensionName(R) << "\", {"
+    OS.indent(4) << "{\"" << getExtensionName(R) << "\", {"
        << R->getValueAsInt("MajorVersion") << ", "
        << R->getValueAsInt("MinorVersion") << "}},\n";
   }
@@ -77,7 +77,7 @@ static void emitRISCVExtensions(RecordKeeper &Records, raw_ostream &OS) {
         if (!ImpliedExt->isSubClassOf("RISCVExtension"))
           continue;
 
-        OS << "    { {\"" << Name << "\"}, \"" << getExtensionName(ImpliedExt)
+        OS.indent(4) << "{ {\"" << Name << "\"}, \"" << getExtensionName(ImpliedExt)
            << "\"},\n";
       }
     }
@@ -236,7 +236,7 @@ static void emitRISCVExtensionBitmask(RecordKeeper &RK, raw_ostream &OS) {
            "duplicated bitmask");
 #endif
 
-    OS << "    {"
+    OS.indent(4) << "{"
        << "\"" << ExtName << "\""
        << ", " << GroupIDVal << ", " << BitPosVal << "ULL"
        << "},\n";