Add doc8 documentation style checking

- add dev dependency
- add doc8 to tasks.py
- fix all doc8 errors

1 files changed, 8 insertions, 13 deletions

diff --git a/docs/features/multiline_commands.rst b/docs/features/multiline_commands.rst
index 85a92bb2..d6502058 100644
--- a/docs/features/multiline_commands.rst
+++ b/docs/features/multiline_commands.rst
@@ -1,17 +1,12 @@
 Multiline Commands
 ==================
 
-Command input may span multiple lines for the
-commands whose names are listed in the
-``multiline_commands`` argument to ``cmd2.Cmd.__init__()``.  These
-commands will be executed only
-after the user has entered a *terminator*.
-By default, the command terminator is
-``;``; specifying the ``terminators`` optional argument to ``cmd2.Cmd.__init__()`` allows different
-terminators.  A blank line
-is *always* considered a command terminator
-(cannot be overridden).
+Command input may span multiple lines for the commands whose names are listed
+in the ``multiline_commands`` argument to ``cmd2.Cmd.__init__()``.  These
+commands will be executed only after the user has entered a *terminator*. By
+default, the command terminator is ``;``; specifying the ``terminators``
+optional argument to ``cmd2.Cmd.__init__()`` allows different terminators.  A
+blank line is *always* considered a command terminator (cannot be overridden).
 
-In multiline commands, output redirection characters
-like ``>`` and ``|`` are part of the command
-arguments unless they appear after the terminator.
+In multiline commands, output redirection characters like ``>`` and ``|`` are
+part of the command arguments unless they appear after the terminator.