diff -Nru source/python/distro_info.py source_b/python/distro_info.py
--- source/python/distro_info.py	2019-03-07 13:33:56.000000000 -0600
+++ source_b/python/distro_info.py	2021-12-17 15:44:54.509722643 -0600
@@ -1,3 +1,4 @@
+# Copyright (C) 2021, Trisquel GNU/Linux developers <trisquel-devel@listas.trisquel.info>
 # Copyright (C) 2009-2012, Benjamin Drung <bdrung@debian.org>
 #
 # Permission to use, copy, modify, and/or distribute this software for any
@@ -12,7 +13,7 @@
 # ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 # OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 
-"""provides information about Ubuntu's and Debian's distributions"""
+"""provides information about Trisquel's and Debian's distributions"""
 
 import csv
 import datetime
@@ -83,7 +84,7 @@
 
 class DistroInfo(object):
     """Base class for distribution information.
-    Use DebianDistroInfo or UbuntuDistroInfo instead of using this directly.
+    Use DebianDistroInfo or TrisquelDistroInfo instead of using this directly.
     """
 
     def __init__(self, distro):
@@ -237,14 +238,14 @@
                 codename in ["unstable", "testing", "stable", "oldstable"])
 
 
-class UbuntuDistroInfo(DistroInfo):
-    """provides information about Ubuntu's distributions"""
+class TrisquelDistroInfo(DistroInfo):
+    """provides information about Trisquel's distributions"""
 
     def __init__(self):
-        super(UbuntuDistroInfo, self).__init__("Ubuntu")
+        super(TrisquelDistroInfo, self).__init__("Trisquel")
 
     def lts(self, date=None, result="codename"):
-        """Get latest long term support (LTS) Ubuntu distribution based on the
+        """Get latest long term support (LTS) Trisquel distribution based on the
            given date."""
         if date is None:
             date = self._date
@@ -262,7 +263,7 @@
         return "LTS" in distros[0].version
 
     def supported(self, date=None, result="codename"):
-        """Get list of all supported Ubuntu distributions based on the given
+        """Get list of all supported Trisquel distributions based on the given
            date."""
         if date is None:
             date = self._date
@@ -270,12 +271,3 @@
                    if date <= x.eol or
                    (x.eol_server is not None and date <= x.eol_server)]
         return distros
-
-    def supported_esm(self, date=None, result="codename"):
-        """Get list of all ESM supported Ubuntu distributions based on the
-           given date."""
-        if date is None:
-            date = self._date
-        distros = [self._format(result, x) for x in self._avail(date)
-                   if x.eol_esm is not None and date <= x.eol_esm]
-        return distros