[PATCH] Fix for Bug #5807

[Sascha Nemecek]

# HG changeset patch
# User Sascha Nemecek <nemecek at wienfluss.net>
# Date 1519831479 -3600
#      Wed Feb 28 16:24:39 2018 +0100
# Node ID 42ddf4ee4f91d76f19ca0c3efc4c8e4c1c6fa96c
# Parent  1bd132a021dd00f96604e33a8fb5306d37e56007
Don't close 'fp' (= 'ui.fout') stream to prevent 'ValueError: I/O 
operation on closed file' (Bug #5807).

Regression of changeset 30261:6bed17ba00a1 
(https://www.mercurial-scm.org/repo/hg/rev/6bed17ba00a1)

diff -r 1bd132a021dd -r 42ddf4ee4f91 hgext/convert/subversion.py
--- a/hgext/convert/subversion.py	Wed Feb 21 14:36:42 2018 +0530
+++ b/hgext/convert/subversion.py	Wed Feb 28 16:24:39 2018 +0100
@@ -149,7 +149,7 @@
          pickle.dump(str(inst), fp, protocol)
      else:
          pickle.dump(None, fp, protocol)
-    fp.close()
+    fp.flush()
      # With large history, cleanup process goes crazy and suddenly
      # consumes *huge* amount of memory. The output file being closed,
      # there is no need for clean termination.