Issue #3444071: move term_merge related function to submodule

This reverts commit 33f429d6, f91325a7 and 4c362a41.

Closes #3444071

@stborchert , thanks, looks like a good PR. I need the other maintainers' agreement to use a submodule or fix the update path.

added 1 commit

• 75120275 - Issue #3444071 by Andriy Khomych: Version 2.0.10 breaks existing...

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merged