diff --git a/src/bin/sage-list-packages b/src/bin/sage-list-packages
index 813b1c0d648..16a6a4ab181 100755
--- a/src/bin/sage-list-packages
+++ b/src/bin/sage-list-packages
@@ -99,8 +99,8 @@ L.sort(key=lambda pkg: pkg.name)
 
 # print (while getting rid of None in versions)
 for pkg in L:
-    pkg.installed_version = pkg.installed_version or 'not_installed'
-    pkg.remote_version = pkg.remote_version or '?'
+    pkg = pkg._replace(installed_version = pkg.installed_version or 'not_installed',
+                       remote_version = pkg.remote_version or '?')
     print(format_string.format(**pkg._asdict()))
 if WARN:
     print(WARN)
diff --git a/src/sage/misc/package.py b/src/sage/misc/package.py
index 0d2c2f5818f..d5665f34c3f 100644
--- a/src/sage/misc/package.py
+++ b/src/sage/misc/package.py
@@ -506,7 +506,7 @@ def standard_packages():
     """
     from sage.misc.superseded import deprecation
     deprecation(30747,
-                'the functions standard_packages, optional_packages, experimental_packages'
+                'the functions standard_packages, optional_packages, experimental_packages '
                 'are deprecated, use sage.features instead')
     pkgs = list_packages('standard', local=True).values()
     return (sorted(pkg.name for pkg in pkgs if pkg.is_installed()),
@@ -543,7 +543,7 @@ def optional_packages():
     """
     from sage.misc.superseded import deprecation
     deprecation(30747,
-                'the functions standard_packages, optional_packages, experimental_packages'
+                'the functions standard_packages, optional_packages, experimental_packages '
                 'are deprecated, use sage.features instead')
     pkgs = list_packages('optional', local=True)
     pkgs = pkgs.values()
@@ -576,7 +576,7 @@ def experimental_packages():
     """
     from sage.misc.superseded import deprecation
     deprecation(30747,
-                'the functions standard_packages, optional_packages, experimental_packages'
+                'the functions standard_packages, optional_packages, experimental_packages '
                 'are deprecated, use sage.features instead')
     pkgs = list_packages('experimental', local=True).values()
     return (sorted(pkg.name for pkg in pkgs if pkg.is_installed()),