mtools: general syntax
3.2.1 General configuration file syntax
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The configuration files is made up of sections. Each section starts
with a keyword identifying the section followed by a colon. Then
follow variable assignments and flags. Variable assignments take the
following form:
name=value
Flags are lone keywords without an equal sign and value following
them. A section either ends at the end of the file or where the next
section begins.
Lines starting with a hash (`#') are comments. Newline characters
are equivalent to whitespace (except where ending a comment). The
configuration file is case insensitive, except for item enclosed in
quotes (such as filenames).