Convert terminology in the Lexer from 'instantiate' and variants to
'expand'. Also update the public API it provides to the new term, and
propagate that update to the various clients.

No functionality changed.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@135138 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/lib/ARCMigrate/TransformActions.cpp b/lib/ARCMigrate/TransformActions.cpp
index 3e49942..2e015da 100644
--- a/lib/ARCMigrate/TransformActions.cpp
+++ b/lib/ARCMigrate/TransformActions.cpp
@@ -388,7 +388,7 @@
 
   if (loc.isFileID())
     return true;
-  return PP.isAtStartOfMacroInstantiation(loc);
+  return PP.isAtStartOfMacroExpansion(loc);
 }
 
 bool TransformActionsImpl::canInsertAfterToken(SourceLocation loc) {
@@ -401,7 +401,7 @@
 
   if (loc.isFileID())
     return true;
-  return PP.isAtEndOfMacroInstantiation(loc);
+  return PP.isAtEndOfMacroExpansion(loc);
 }
 
 bool TransformActionsImpl::canRemoveRange(SourceRange range) {