doc update and fix tests

CHANGELOG

@@ -1,6 +1,6 @@
 jc changelog
 
-20231002 v1.23.5
+20231021 v1.23.5
 - Add `host` command parser
 - Add `nsd-control` command parser
 - Add `lsb_release` command parser
@@ -12,6 +12,7 @@ jc changelog
 - Fix `x509-cert` parser to allow negative serial numbers
 - Fix `x509-cert` parser for cases when bitstrings are larger than standard
 - Fix `xrandr` command parser for associated device issues
+- Fix error when pygments library is not installed
 
 20230730 v1.23.4
 - Add `/etc/resolve.conf` file parser

tests/test_jc_cli.py

@@ -1,8 +1,12 @@
 import os
 import unittest
 from datetime import datetime, timezone
-import pygments
-from pygments.token import (Name, Number, String, Keyword)
+try:
+    import pygments
+    from pygments.token import (Name, Number, String, Keyword)
+    PYGMENTS_INSTALLED=True
+except ModuleNotFoundError:
+    PYGMENTS_INSTALLED=False
 from jc.cli import JcCli
 
 
@@ -42,6 +46,7 @@ class MyTests(unittest.TestCase):
             self.assertEqual(expected, resulting_attributes)
 
     def test_cli_set_env_colors(self):
+        if PYGMENTS_INSTALLED:
             if pygments.__version__.startswith('2.3.'):
                 env = {
                     '': {
@@ -140,6 +145,7 @@ class MyTests(unittest.TestCase):
                 self.assertEqual(cli.custom_colors, expected_colors)
 
     def test_cli_json_out(self):
+        if PYGMENTS_INSTALLED:
             test_input = [
                 None,
                 {},
@@ -173,6 +179,7 @@ class MyTests(unittest.TestCase):
                 self.assertEqual(cli.json_out(), expected_json)
 
     def test_cli_json_out_mono(self):
+        if PYGMENTS_INSTALLED:
             test_input = [
                 None,
                 {},
@@ -221,6 +228,7 @@ class MyTests(unittest.TestCase):
                 self.assertEqual(cli.json_out(), expected_json)
 
     def test_cli_yaml_out(self):
+        if PYGMENTS_INSTALLED:
             test_input = [
                 None,
                 {},