Log: syslog formatting fixes (#12324)

This broke on production because `self._level_to_color` and
`self._pad_event` don't exist anymore in the class. We will need to
migrate this code if we want.

Author: humitos

readthedocs/core/logs.py

@@ -82,6 +82,8 @@ def __call__(self, logger, method_name, event_dict):
 
 
 class SysLogRenderer(structlog.dev.ConsoleRenderer):
+    # Line generated by our custom ``SysLogRenderer``
+    # %programname[%processid]: %timestamp [%level] %message [%logger:%linenumber] %structureddata
     def __call__(self, logger, name, event_dict):
         sio = StringIO()
 
@@ -108,9 +110,12 @@ def __call__(self, logger, name, event_dict):
         if level is not None:
             sio.write(
                 "["
-                + self._level_to_color.get(level, "")
+                # NOTE: I'm removing the color for now to avoid failing.
+                # we could adapt this code to work with the latest version of structlog.
+                #
+                # + self._level_to_color.get(level, "")
                 + _pad(level, self._longest_level)
-                + self._styles.reset
+                # + self._styles.reset
                 + "] "
             )
 
@@ -120,7 +125,7 @@ def __call__(self, logger, name, event_dict):
             event = str(event)
 
         if event_dict:
-            event = _pad(event, self._pad_event) + self._styles.reset + " "
+            event = _pad(event, 50) + self._styles.reset + " "
         else:
             event += self._styles.reset
         sio.write(self._styles.bright + event)