Upgrade fonttools to 3.39.0

am: a2a985d834

Change-Id: Id1604aa430c5f0d93e7808c37ff0906fe72410a1

1 files changed, 15 insertions, 10 deletions

diff --git a/Lib/fontTools/feaLib/ast.py b/Lib/fontTools/feaLib/ast.py
index 7bf64981..39dc4bcf 100644
--- a/Lib/fontTools/feaLib/ast.py
+++ b/Lib/fontTools/feaLib/ast.py
@@ -821,19 +821,20 @@ class LookupFlagStatement(Statement):
                                 markAttach, markFilter)
 
     def asFea(self, indent=""):
-        res = "lookupflag"
+        res = []
         flags = ["RightToLeft", "IgnoreBaseGlyphs", "IgnoreLigatures", "IgnoreMarks"]
         curr = 1
         for i in range(len(flags)):
             if self.value & curr != 0:
-                res += " " + flags[i]
+                res.append(flags[i])
             curr = curr << 1
         if self.markAttachment is not None:
-            res += " MarkAttachmentType {}".format(self.markAttachment.asFea())
+            res.append("MarkAttachmentType {}".format(self.markAttachment.asFea()))
         if self.markFilteringSet is not None:
-            res += " UseMarkFilteringSet {}".format(self.markFilteringSet.asFea())
-        res += ";"
-        return res
+            res.append("UseMarkFilteringSet {}".format(self.markFilteringSet.asFea()))
+        if not res:
+            res = ["0"]
+        return "lookupflag {};".format(" ".join(res))
 
 
 class LookupReferenceStatement(Statement):
@@ -905,20 +906,24 @@ class MarkMarkPosStatement(Statement):
 
 
 class MultipleSubstStatement(Statement):
-    def __init__(self, prefix, glyph, suffix, replacement, location=None):
+    def __init__(
+        self, prefix, glyph, suffix, replacement, forceChain=False, location=None
+    ):
         Statement.__init__(self, location)
         self.prefix, self.glyph, self.suffix = prefix, glyph, suffix
         self.replacement = replacement
+        self.forceChain = forceChain
 
     def build(self, builder):
         prefix = [p.glyphSet() for p in self.prefix]
         suffix = [s.glyphSet() for s in self.suffix]
         builder.add_multiple_subst(
-            self.location, prefix, self.glyph, suffix, self.replacement)
+            self.location, prefix, self.glyph, suffix, self.replacement,
+            self.forceChain)
 
     def asFea(self, indent=""):
         res = "sub "
-        if len(self.prefix) or len(self.suffix):
+        if len(self.prefix) or len(self.suffix) or self.forceChain:
             if len(self.prefix):
                 res += " ".join(map(asFea, self.prefix)) + " "
             res += asFea(self.glyph) + "'"
@@ -1088,7 +1093,7 @@ class SubtableStatement(Statement):
         builder.add_subtable_break(self.location)
 
     def asFea(self, indent=""):
-        return indent + "subtable;"
+        return "subtable;"
 
 
 class ValueRecord(Expression):