Minor doc updates, fixes and improvements

In particular, removed code which no longer worked, made light
theme easier on the eyes, added slight syntax highlightning,
and fixed search for exact matches.

telethon_generator/parsers/tlobject/tlarg.py

@@ -1,6 +1,19 @@
 import re
 
 
+def _fmt_strings(*dicts):
+    for d in dicts:
+        for k, v in d.items():
+            if v in ('None', 'True', 'False'):
+                d[k] = '<strong>{}</strong>'.format(v)
+            else:
+                d[k] = re.sub(
+                    r'([brf]?([\'"]).*\2)',
+                    lambda m: '<em>{}</em>'.format(m.group(1)),
+                    v
+                )
+
+
 KNOWN_NAMED_EXAMPLES = {
     ('message', 'string'): "'Hello there!'",
     ('expires_at', 'date'): 'datetime.timedelta(minutes=5)',
@@ -41,6 +54,8 @@ KNOWN_TYPED_EXAMPLES = {
     'InputPeer': "'username'"
 }
 
+_fmt_strings(KNOWN_NAMED_EXAMPLES, KNOWN_TYPED_EXAMPLES)
+
 SYNONYMS = {
     'InputUser': 'InputPeer',
     'InputChannel': 'InputPeer',