syntax: simplify most literal index expressions within arithmetic #1
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Exclude known problematic/unportable cases involving `*` and `@` instead of all index expressions. See commit 9c62772 for more info.
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Exclude known problematic/unportable cases involving
*and@instead of all index expressions.To me, skipping simplifications of all index expressions within arithmetic because there are a few cases where it cannot be done is somewhat unfortunate. I believe the problematic cases are rare in practice, because expressions such as
${!a[*]},${#a[*]}where*and@are commonly present are already (and need to be) skipped due to other reasons besides what's in the index.