Fix RCG so that Goto -> From pairs can lead directly into another Goto.

The RCG was creating multiple output lines for the same node, which is generally ok but breaks an assumption made in the Goto-From removal code. See gitlab #268 (closed) for full explanation. Closes #268 (closed).

assigned to @jonathan-hanks

added 1 commit

• 74c6552d - rcg: Changed add_line so that it will work if the parent line, perhaps...

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mentioned in commit 2ec7f5c7