Add "cols" parameter to the textarea macro

Macro textarea depends on cols variable, but there is no way to pass it.
merged branch unkind/master (PR #1193)

This PR was merged into the master branch.

Discussion
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Add "cols" parameter to the textarea macro

Macro textarea depends on cols variable, but there is no way to pass it.

Commits
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c735d6d Add "cols" parameter to the textarea macro