'brackets': Allow unset ZSH_HIGHLIGHT_STYLES
Without this when bracket_color_size is 0, $(( (levelpos[$pos] - 1) % bracket_color_size + 1 )) errors with division by zero.
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@ -76,7 +76,9 @@ _zsh_highlight_brackets_highlighter()
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# Now highlight all found brackets
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for pos in ${(k)levelpos}; do
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if (( $+matching[$pos] )); then
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style=bracket-level-$(( (levelpos[$pos] - 1) % bracket_color_size + 1 ))
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if (( bracket_color_size )); then
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style=bracket-level-$(( (levelpos[$pos] - 1) % bracket_color_size + 1 ))
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fi
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else
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style=bracket-error
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fi
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