Why ban underscores?

[Tobias Geerinckx-Rice <me@tobias.gr>]

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Guix, Ludo',

I was surprised by this commit:

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commit 426ade6c8bdab243da719e369a887284368179bb (upstream/master)
Author: Xinglu Chen <public@yoctocell.xyz>

    import: go: Replace underscores with hyphens in package names.

    As per section '16.4.2 Package Naming' in the manual, use 
    hypens
    [sic] instead of underscores in package names.

    * guix/import/go.scm (go-module->guix-package-name): Replace
    underscores with hyphens.

    Signed-off-by: Leo Famulari <leo@famulari.name>
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Indeed, underscores were explicitly banned in 2014 (commit 
25083588).  Why?

Where's the advantage in renaming the following packages from 
their canonical names?

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λ ./pre-inst-env guix lint -c name # not upstream yet :-)
guix/packages.scm:464:2: efi_analyzer@0.0.0-0.77c9e3a: name should 
not contain '_'
gnu/packages/file-systems.scm:606:10: jfs_fsck-static@1.1.15: name 
should not contain '_'
gnu/packages/installers.scm:36:12: nsis-x86_64@3.05: name should 
not contain '_'
gnu/packages/mingw.scm:47:12: mingw-w64-x86_64@8.0.0: name should 
not contain '_'
gnu/packages/mingw.scm:47:12: mingw-w64-x86_64-winpthreads@8.0.0: 
name should not contain '_'
gnu/packages/perl.scm:2264:10: perl-crypt-unixcrypt_xs@0.11: name 
should not contain '_'
gnu/packages/python-web.scm:2528:10: python-requests_ntlm@1.1.0: 
name should not contain '_'
gnu/packages/ruby.scm:5450:10: ruby-progress_bar@1.1.0: name 
should not contain '_'
gnu/packages/ruby.scm:9222:10: ruby_version@1.0.2: name should not 
contain '_'
gnu/packages/ruby.scm:4808:10: ruby-data_uri@0.1.0: name should 
not contain '_'
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I'd rather change the manual to allow underscores than blacklist 
them, but am curious why they were cancelled in the first place.

Kind regards,

T G-R

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