In «a="b=c"; $a», the '=' sign in the expansion of $a is not active.
Therefore, prevent the expansion of $a from being considered an
assignment. Update test expectations accordingly.
Before the parent commit, they behaved as follows:
ZSH_PATCHLEVEL=debian/5.7.1-1
# parameter-value-contains-command-position1
1..2
ok 1 - [1,7] «$foobar» - # TODO "issue #670"
not ok 2 - have 1 expectations and 6 region_highlight entries: «expected_region_highlight=( '1 7 assign "issue ♯670"' )» «region_highlight=( '0 7 assign' '2 7 default' '2 7 command-substitution-unquoted'
zsh-syntax-highlighting: BUG: _zsh_highlight_highlighter_main_paint: start(2) >= end(2)
Bail out! On './highlighters/main/test-data/parameter-value-contains-command-position2.zsh': output on stderr
# parameter-value-contains-command-position2
1..2
ok 1 - [1,2] «$y» - # TODO "issue #670"
ok 2 - cardinality check
Due to the the "BUG:" and "Bail out!" on the first one, they could not
be added as XFAIL tests before the parent commit.
