possible regression to bug with hyphen in tag key

[d3banjan]

Related issues with hyphen in TAG KEY -
#3863

Demonstration -

> SHOW TAG VALUES WITH KEY =~ /.*/ LIMIT 2
name: measurement1
key          value
---          -----
tag-key1 tag-val1
tag-key1 tag-val2

name: power
key          value
---          -----
tag-key1 tag-val1
tag-key1 tag-val2

name: temperature
key          value
---          -----
tag-key1 tag-val1
tag-key1 tag-val2

name: volume-current
key          value
---          -----
tag-key1 tag-val1
tag-key1 tag-val2


> SHOW TAG VALUES WITH KEY =~ /tag-.*/
> SHOW TAG VALUES WITH KEY = "tag-key1"

[dgnorton]

@d3banjan what version of InfluxDB?

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