[issue3286] convert fails with blank lines in branchmap

[A. Budden]

New submission from A. Budden <abudden+MERCURIAL at gmail.com>:

If there are blank lines at the end of a branch map file, convert aborts
with an error message.  I would expect it to ignore these blank lines.

$ bzr init tb
Created a standalone tree (format: 2a)
$ echo -ne "trunk default\n\n" > bm
$ hg convert --branchmap bm tb tm
initializing destination tm repository
abort: syntax error in bm(2): key/value pair expected

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messages: 19181
nosy: abudden
priority: bug
status: unread
title: convert fails with blank lines in branchmap

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<http://mercurial.selenic.com/bts/issue3286>
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