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01/01: gnu: build: Improve comments.

From: Danny Milosavljevic
Subject: 01/01: gnu: build: Improve comments.
Date: Wed, 31 May 2017 13:39:35 -0400 (EDT)

dannym pushed a commit to branch master
in repository guix.

commit cdc701ea48207b16fd181cac3c74172c6db483ed
Author: Danny Milosavljevic <address@hidden>
Date:   Wed May 31 19:38:49 2017 +0200

    gnu: build: Improve comments.
    * gnu/build/file-systems.scm (iso9660-superblock-volume-name):
    Add clarifying comment.
 gnu/build/file-systems.scm | 1 +
 1 file changed, 1 insertion(+)

diff --git a/gnu/build/file-systems.scm b/gnu/build/file-systems.scm
index 17c1182..3b831c0 100644
--- a/gnu/build/file-systems.scm
+++ b/gnu/build/file-systems.scm
@@ -283,6 +283,7 @@ SBLOCK as a bytevector."
 (define (iso9660-superblock-volume-name sblock)
   "Return the volume name of SBLOCK as a string.  The volume name is an ASCII
 string.  Trailing spaces are trimmed."
+  ;; Note: Valid characters are of the set "[0-9][A-Z]_" (ECMA-119 Appendix A)
   (string-trim-right (latin1->string (sub-bytevector sblock 40 32)
                                      (lambda (c) #f)) #\space))

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