Does not work correctly when \$ appears anywhere other than the start of a string

[jdcrensh]

via facebook/create-react-app#3961

Escaping a string with \$ works fine when it occurs at the start of the string, but not anywhere else within the string.

Example:

MYVAR=\$bar.baz <- works as expected, value is "$bar.baz"
MYVAR=foo\$bar.baz <- I'd expect "foo$bar.baz" but I get "foo\.baz"

I also tried working around the problem, like so:

BAR=\$bar
MYVAR=foo$BAR.baz

But it gave the same result of "foo\.baz"