`strfmt` uses the experimental `concept` feature with weird symbol binding 
rules. You cannot blame macros for this.

This snippet works perfectly fine
    
    
    from nre import re, match, RegexMatch, captures, `[]`
    from options import isSome, get
    from streams import Stream, readAll, newFileStream
    from strfmt import fmt, ftStr, faDefault, fsMinus, addformat, format, write
    from strutils import splitLines, `%`
    from tables import OrderedTableRef, newOrderedTable, contains, `[]=`, `$`
    
    let sectname = "foo"
    let line = "bar"
    echo "{0:-12s} {1:s}".fmt(sectname, line)
    

Note that I had to import `write` to make the `Writer` concept happy.

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