diff -r 0e8b0b9a7acc -r 25b37900d6e0 mercurial/cffi/mpatch.py
--- a/mercurial/cffi/mpatch.py	Tue May 02 21:15:31 2017 +0900
+++ b/mercurial/cffi/mpatch.py	Tue May 02 21:45:10 2017 +0900
@@ -14,37 +14,35 @@
 ffi = _mpatch.ffi
 lib = _mpatch.lib
 
-if True:
-    if True:
-        @ffi.def_extern()
-        def cffi_get_next_item(arg, pos):
-            all, bins = ffi.from_handle(arg)
-            container = ffi.new("struct mpatch_flist*[1]")
-            to_pass = ffi.new("char[]", str(bins[pos]))
-            all.append(to_pass)
-            r = lib.mpatch_decode(to_pass, len(to_pass) - 1, container)
-            if r < 0:
-                return ffi.NULL
-            return container[0]
+@ffi.def_extern()
+def cffi_get_next_item(arg, pos):
+    all, bins = ffi.from_handle(arg)
+    container = ffi.new("struct mpatch_flist*[1]")
+    to_pass = ffi.new("char[]", str(bins[pos]))
+    all.append(to_pass)
+    r = lib.mpatch_decode(to_pass, len(to_pass) - 1, container)
+    if r < 0:
+        return ffi.NULL
+    return container[0]
 
-        def patches(text, bins):
-            lgt = len(bins)
-            all = []
-            if not lgt:
-                return text
-            arg = (all, bins)
-            patch = lib.mpatch_fold(ffi.new_handle(arg),
-                                    lib.cffi_get_next_item, 0, lgt)
-            if not patch:
-                raise mpatchError("cannot decode chunk")
-            outlen = lib.mpatch_calcsize(len(text), patch)
-            if outlen < 0:
-                lib.mpatch_lfree(patch)
-                raise mpatchError("inconsistency detected")
-            buf = ffi.new("char[]", outlen)
-            if lib.mpatch_apply(buf, text, len(text), patch) < 0:
-                lib.mpatch_lfree(patch)
-                raise mpatchError("error applying patches")
-            res = ffi.buffer(buf, outlen)[:]
-            lib.mpatch_lfree(patch)
-            return res
+def patches(text, bins):
+    lgt = len(bins)
+    all = []
+    if not lgt:
+        return text
+    arg = (all, bins)
+    patch = lib.mpatch_fold(ffi.new_handle(arg),
+                            lib.cffi_get_next_item, 0, lgt)
+    if not patch:
+        raise mpatchError("cannot decode chunk")
+    outlen = lib.mpatch_calcsize(len(text), patch)
+    if outlen < 0:
+        lib.mpatch_lfree(patch)
+        raise mpatchError("inconsistency detected")
+    buf = ffi.new("char[]", outlen)
+    if lib.mpatch_apply(buf, text, len(text), patch) < 0:
+        lib.mpatch_lfree(patch)
+        raise mpatchError("error applying patches")
+    res = ffi.buffer(buf, outlen)[:]
+    lib.mpatch_lfree(patch)
+    return res