convert/gnuarch: parse continuation-of revisions in gnuarch source In GNU Arch, continuation-of was often used for: - tagging revisions - continue working on a project in a new archive, because arch was scaling poorly in revision numbers (cat-logs were slow to be parsed and scanned through) - very similar to the previous point, fork his own branch of a project. Parsing this header information will allow to 'follow' new history because it often hints at older/forked/personal revision trees. This patch however just implements the parsing of the continuation-of header. A followup patch will implement the proper use of this new information.

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adding a

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diff -r 107ba6f817b5 -r 310ce7989cdc a

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--- a/a	Thu Jan 01 00:00:01 1970 +0000

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+++ b/a	Thu Jan 01 00:00:02 1970 +0000

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@@ -1,2 +1,3 @@

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 confuse str.splitlines

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 embedded

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newline