shelve: make the interactive mode experimental stable

shelve: make the interactive mode experimental

While fixing issue4304: "record: allow editing new files" we introduced
changes in record/crecord. These changes need to be matched with changes in any
command using record. Shelve is one of these commands and the changes have
not been made for this release. Therefore, shelve -i should be an experimental
feature for this release.

--- a/hgext/shelve.py	Mon Apr 27 15:12:41 2015 -0700
+++ b/hgext/shelve.py	Mon Apr 27 15:36:10 2015 -0700
@@ -658,7 +658,8 @@
           ('p', 'patch', None,
            _('show patch')),
           ('i', 'interactive', None,
-           _('interactive mode, only works while creating a shelve')),
+           _('interactive mode, only works while creating a shelve'
+                   '(EXPERIMENTAL)')),
           ('', 'stat', None,
            _('output diffstat-style summary of changes'))] + commands.walkopts,
          _('hg shelve [OPTION]... [FILE]...'))

--- a/tests/test-shelve.t	Mon Apr 27 15:12:41 2015 -0700
+++ b/tests/test-shelve.t	Mon Apr 27 15:36:10 2015 -0700
@@ -60,7 +60,6 @@
    -m --message TEXT        use text as shelve message
    -n --name NAME           use the given name for the shelved commit
    -p --patch               show patch
-   -i --interactive         interactive mode, only works while creating a shelve
       --stat                output diffstat-style summary of changes
    -I --include PATTERN [+] include names matching the given patterns
    -X --exclude PATTERN [+] exclude names matching the given patterns