manifest: move parsing functions up in file

These functions are about to change signature and be hidden inside the
manifestdict constructor. Doing the code motion now as an isolated
change to make things easier to review.

mercurial/manifest.py

@@ -9,6 +9,25 b' from i18n import _'
 import mdiff, parsers, error, revlog, util
 import array, struct
 
+# Pure Python fallback
+def _parsemanifest(mfdict, fdict, lines):
+    bin = revlog.bin
+    for l in lines.splitlines():
+        f, n = l.split('\0')
+        if len(n) > 40:
+            fdict[f] = n[40:]
+            mfdict[f] = bin(n[:40])
+        else:
+            mfdict[f] = bin(n)
+
+def _parse(lines):
+    mfdict = manifestdict()
+    try:
+        parsers.parse_manifest(mfdict, mfdict._flags, lines)
+    except AttributeError:
+        _parsemanifest(mfdict, mfdict._flags, lines)
+    return mfdict
+
 class manifestdict(dict):
     def __init__(self):
         self._flags = {}
@@ -217,25 +236,6 b' def _addlistdelta(addlist, x):'
                    + content for start, end, content in x)
     return deltatext, newaddlist
 
-# Pure Python fallback
-def _parsemanifest(mfdict, fdict, lines):
-    bin = revlog.bin
-    for l in lines.splitlines():
-        f, n = l.split('\0')
-        if len(n) > 40:
-            fdict[f] = n[40:]
-            mfdict[f] = bin(n[:40])
-        else:
-            mfdict[f] = bin(n)
-
-def _parse(lines):
-    mfdict = manifestdict()
-    try:
-        parsers.parse_manifest(mfdict, mfdict._flags, lines)
-    except AttributeError:
-        _parsemanifest(mfdict, mfdict._flags, lines)
-    return mfdict
-
 class manifest(revlog.revlog):
     def __init__(self, opener):
         # During normal operations, we expect to deal with not more than four