rebase: fix selection of base used when rebasing merge (issue4041) Prior this changeset, rebasing a merge whose first parent was not in the rebase lead to wrong and highly conflicting merge. See the in-line comment for details. Test have been updated with the data provided by the reported.

doc: fix internal date sample (issue4072)

largefiles: use 'remote'/'local' in merge prompts like in other merge prompts Prompts like foo has been turned into a largefile use (l)argefile or keep as (n)ormal file? was not as clear as the usual prompts that use 'remote' or 'local' to explain what happened on which side ... especially not when used to the normal prompts. "as" could also indicate that it would be possible to take the content of the largefile and somehow put it into the normal file. It could make it more clear that it was a choice between one side or the other. For consistency we will now phrase it like: remote turned local normal file f into a largefile use (l)argefile or keep (n)ormal file?