[flang] Update ControlFlowGraph.md

Original-commit: flang-compiler/f18@50ce01185f
Reviewed-on: https://github.com/flang-compiler/f18/pull/301
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psteinfeld 2019-02-25 10:47:17 -08:00 committed by GitHub
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@ -18,7 +18,7 @@ of a subprogram's control flow graph in place.
A _control flow graph_ is a collection of simple (_i.e.,_ "non-extended")
basic _blocks_ that comprise straight-line sequences of _actions_ with a
single entry point and a single exit point, and a collection of
directed flow _edges_ (or _arcs_) denoting all possible transition of
directed flow _edges_ (or _arcs_) denoting all possible transitions of
control flow that may take place during execution from the end of
one basic block to the beginning of another (or itself).