Fix comment filtering on command

[OskarDamkjaer]

Replaced the comment regex with a filter that easier to understand and doesn't have this issue:

However. This is an edge-case but could happen:

It seems to me from https://neo4j.com/docs/2.2.2/cypher-comments.html that cypher supports comments, any reason why we need to "clean the command"? Could it not simply be removed (perhaps some version stuff with cypher?).

From some initial looks this

Doesn't work if we let cypher handle the comments because then the second statement is evaluated as cypher instead of a command. So perhaps leaving the cleaning as it is is preferable? The current implementation has that awkward edgecase but at least the syntax highlighting indicates the something might be wrong.

changelog: Fix comment issue in multi statement commands

[huboneo]

LGTM

[pe4cey]

This is something for the future, but I think it's worth considering extending the cypher-codemirror component to strip the comments out (although the comments are used as the name for favourited scripts 🤔 )

[OskarDamkjaer]

@pe4cey Code mirror does strip comments but it's seems it just doesn't do it correctly all the time. We're moving away from codemirror so I thought it'd take to long to fix it in that code base instead