Change \t to spaces

llvm-svn: 337530
diff --git a/clang/include/clang-c/BuildSystem.h b/clang/include/clang-c/BuildSystem.h
index c999dab..3cfec38 100644
--- a/clang/include/clang-c/BuildSystem.h
+++ b/clang/include/clang-c/BuildSystem.h
@@ -66,7 +66,7 @@
  */
 CINDEX_LINKAGE enum CXErrorCode
 clang_VirtualFileOverlay_setCaseSensitivity(CXVirtualFileOverlay,
-											int caseSensitive);
+                                            int caseSensitive);
 
 /**
  * Write out the \c CXVirtualFileOverlay object to a char buffer.