[clang] Improve SourceManager::PrintStats()

This fixes a typo ("SLocEntry's" -> "SLocEntries"), fixes capitalization ("Sloc" -> "SLoc") and adds extra information (capacity in bytes of `LoadedSLocEntryTable`).

clang/lib/Basic/SourceManager.cpp

@@ -2121,14 +2121,16 @@ void SourceManager::PrintStats() const {
   llvm::errs() << "\n*** Source Manager Stats:\n";
   llvm::errs() << FileInfos.size() << " files mapped, " << MemBufferInfos.size()
                << " mem buffers mapped.\n";
-  llvm::errs() << LocalSLocEntryTable.size() << " local SLocEntry's allocated ("
+  llvm::errs() << LocalSLocEntryTable.size() << " local SLocEntries allocated ("
                << llvm::capacity_in_bytes(LocalSLocEntryTable)
-               << " bytes of capacity), "
-               << NextLocalOffset << "B of Sloc address space used.\n";
+               << " bytes of capacity), " << NextLocalOffset
+               << "B of SLoc address space used.\n";
   llvm::errs() << LoadedSLocEntryTable.size()
-               << " loaded SLocEntries allocated, "
+               << " loaded SLocEntries allocated ("
+               << llvm::capacity_in_bytes(LoadedSLocEntryTable)
+               << " bytes of capacity), "
                << MaxLoadedOffset - CurrentLoadedOffset
-               << "B of Sloc address space used.\n";
+               << "B of SLoc address space used.\n";
 
   unsigned NumLineNumsComputed = 0;
   unsigned NumFileBytesMapped = 0;