read-print: 'canonicalize-comment' leaves top-level comments unchanged.

This lets users use three leading semicolons, for instance, in top-level
comments.

* guix/read-print.scm (canonicalize-comment): Add INDENT parameter and
honor it.
(pretty-print-with-comments): Change default value of #:format-comment.
Call FORMAT-COMMENT with INDENT as the second argument.
* tests/read-print.scm: Adjust test accordingly.

1 files changed, 3 insertions, 1 deletions

diff --git a/tests/read-print.scm b/tests/read-print.scm
index 94f018dd443..e3f23194af3 100644
--- a/tests/read-print.scm
+++ b/tests/read-print.scm
@@ -274,6 +274,7 @@ mnopqrstuvwxyz.\")"
 
 (test-pretty-print/sequence "
 ;;; Hello!
+;;; Notice that there are three semicolons here.
 
 (define-module (foo bar)
   #:use-module (guix)
@@ -286,7 +287,8 @@ mnopqrstuvwxyz.\")"
   (locale \"eo_EO.UTF-8\")
 
   (services
-   (cons (service mcron-service-type) %base-services)))\n")
+   (cons (service mcron-service-type) %base-services)))\n"
+                            #:format-comment canonicalize-comment)
 
 (test-equal "pretty-print-with-comments, canonicalize-comment"
   "\