This is a followup to f7744227699d27045e87be9eac3464c2f62ff7e3, which
changed the rule without updating the test.

* tests/read-print.scm ("keyword-value-same-line"): Adjust.

Change-Id: Ie802ef3d2e577cb0647158baed0606c958394c06

Fixes <https://issues.guix.gnu.org/65427>.

* guix/read-print.scm (%special-forms): Add ‘parameterize’.
* tests/read-print.scm: Add test.

Reported-by: Maxime Devos <maximedevos@telenet.be>
Change-Id: I922bffc527ade539cf2eb304acb25bc9c705a459

This follows up on commit 974b04ab8063382f3a91b0cf5e46bac6e0238672, which
I tested with the wrong test (tests/style.scm) instead.  Oops.

* tests/read-print.scm: Update two TEST-PRETTY-PRINT strings.

* guix/read-print.scm (read-with-comments): Check whether REST is a pair
before calling 'set-cdr!'.
* tests/read-print.scm ("read-with-comments: half dot notation"): New test.

* guix/read-print.scm (printed-string)[preserve-newlines?]: New
procedure.
Use it to preserve newlines on long strings.
* tests/read-print.scm: Add test.

Fixes <https://issues.guix.gnu.org/62059>.
Reported by Maxim Cournoyer <maxim.cournoyer@gmail.com>.

* guix/read-print.scm (read-with-comments): Special-case #~, #$, and #+.
* tests/read-print.scm: Add two tests.

Fixes <https://issues.guix.gnu.org/61013>.
Reported by Maxim Cournoyer <maxim.cournoyer@gmail.com>.

* guix/read-print.scm (pretty-print-with-comments)[starts-with-line-comment?]:
New procedure.
Use it when printing a list.
* tests/read-print.scm: Add two tests.

* guix/read-print.scm (%special-non-extended-symbols): New variable.
(symbol->display-string): New procedure.
(pretty-print-with-comments): Use it in lieu of 'string->symbol'.
* tests/read-print.scm: Add test.

Previously (home-environment (services ...)) would not be considered a
"newline form".  This fixes it.

* guix/read-print.scm (newline-form?): Use 'vhash-foldq*' instead of
'vhash-assq' and iterate over candidates.
* tests/read-print.scm: Add test.

Previously, the pretty-printer would unconditionally leave everything
but double-quotes and backslashes unescaped when rendering a string.
With this change, the previous behavior only applies to forms listed in
%NATURAL-WHITESPACE-STRING-FORMS.

* guix/read-print.scm (%natural-whitespace-string-forms): New variable.
(printed-string): New procedure.
(pretty-print-with-comments): Use it instead of 'escaped-string'.
* tests/read-print.scm: Add test.