Add a word wrapping for comment log messages to AdviceLogger

The comments logged through AdviceLogger are now wrapped up to 70
characters. This change has been documented in the docstrings.

ipalib/frontend.py

@@ -35,6 +35,7 @@ from errors import (ZeroArgumentError, MaxArgumentError, OverlapError,
     VersionError, OptionError, InvocationError,
     ValidationError, ConversionError)
 from ipalib import messages
+from textwrap import wrap
 
 
 RULE_FLAG = 'validation_rule'
@@ -1454,8 +1455,12 @@ class _AdviceOutput(object):
         self.prefix = '# '
         self.options = None
 
-    def comment(self, line):
-        self.content.append(self.prefix + line)
+    def comment(self, line, wrapped=True):
+        if wrapped:
+            for wrapped_line in wrap(line, 70):
+                self.content.append(self.prefix + wrapped_line)
+        else:
+            self.content.append(self.prefix + line)
 
     def debug(self, line):
         if self.options.verbose:

ipaserver/advise/base.py

@@ -46,7 +46,7 @@ Optionally, you can require root privileges for your plugin:
 
 The following method should be implemented in your plugin:
 
->>>.....def get_info():
+>>>     def get_info():
 >>>         self.log.debug('Entering execute() method')
 >>>         self.log.comment('Providing useful advice just for you')
 >>>         self.log.command('yum update sssd -y')
@@ -55,6 +55,11 @@ As you can see, Advice's log has 3 different levels. Debug lines are printed
 out with '# DEBUG:' prefix if --verbose had been used. Comment lines utilize
 '# ' prefix and command lines are printed raw.
 
+Please note that comments are automatically wrapped after 70 characters.
+Use wrapped=False option to force the unwrapped line in the comment.
+
+>>>         self.log.comment("This line should not be wrapped", wrapped=False)
+
 As a result, you can redirect the advice's output directly to a script file.
 
 # ipa-advise sample-advice > script.sh