[releng] Improve description of string freeze

[Michael Catanzaro <mcatanzaro src gnome org>]

commit d06463ee9b4279c58a4dbe1259207d67e1aa8537
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Tue Feb 11 18:37:30 2020 -0600

    Improve description of string freeze
    
    For some reason, the mailer is generating a > character which turns the
    second line into a quote.

 tools/schedule/libschedule.py | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/tools/schedule/libschedule.py b/tools/schedule/libschedule.py
index 07033c4..f3f72f5 100755
--- a/tools/schedule/libschedule.py
+++ b/tools/schedule/libschedule.py
@@ -66,8 +66,8 @@ API freeze is not required for non-platform libraries, but is recommended.""",
 This allows developers to concentrate on refining the new features instead of adding yet more 
functionality.""",
                 'ui': """No major UI changes may be made without confirmation from the release team. Small 
fixes do not require permission.""",
                 'string': """No string changes may be made without confirmation from the i18n team.
-From this point, developers can concentrate on stability and bugfixing. Translators can work without 
worrying that the original English strings will change, and documentation writers can take accurate 
screenshots.
-For the string freezes explained, and to see which kind of changes are not covered by freeze rules, check 
https://wiki.gnome.org/TranslationProject/HandlingStringFreezes. """,
+
+From this point, developers can concentrate on stability and bugfixing. Translators can work without 
worrying that the original English strings will change, and documentation writers can take accurate 
screenshots. For explanation of the string freeze, and to see which kind of changes are not covered by freeze 
rules, check https://wiki.gnome.org/TranslationProject/HandlingStringFreezes. """,
                 'hard-code': """This is a late freeze to avoids sudden last-minute accidents which could 
risk the stability that should have been reached at this point. No source code changes are allowed without 
approval from the release team, but translation and documentation should continue. Simple build fixes are, of 
course, allowed without asking. """,
                 'hard-code-end': """Hard Code Freeze ends, but other freezes remain in effect for the stable 
branch."""
             },