Commits on Sep 23, 2022

1. env: fix errors on valid interpolation expressions …

   The parser was too strict here and would reject valid constructs
   that used an unescaped `$` that was not part of a variable
   expression (and not ambiguous).
   
   Now, only errors for unmatched braced expressions (e.g. `${FOO`)
   are returned, but other valid cases are ignored and the `$` will
   be treated literally, e.g. `a $ string` -> `a $ string`, which is
   the same as in POSIX.
   
   Signed-off-by: Milas Bowman <milas.bowman@docker.com>

   

   milas committed Sep 23, 2022
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