A few syntax cleanups

Suggested by PyCharm.  Includes three "real" changes:

1. src/engine/SCons/Node/__init__.py has a print statement in a function
   which references 'self', but there is no 'self' defined (it is not
   a method in a class). Guessing it should have been 'node'.
2. src/engine/SCons/Environment.py makes a call using 'kwbd' which is not
   defined, looks like a copy-paste error and should be 'bd'.
3. src/engine/SCons/Tool/JavaCommon.py splits 'file', which is not
   defined, was evidently supposed to be 'fn'.

These should be double-checked.

The rest are purely syntax: whitespace, dropping trailing semicolons,
using "is" to test for None, simplifying comparisons, normalizing
docstring commenting ("always triple double quotes"), unneeded
backslashes.

Signed-off-by: Mats Wichmann <mats@linux.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/src/engine/SCons/Action.py b/src/engine/SCons/Action.py
index 9a3888b..78fb7d0 100644
--- a/src/engine/SCons/Action.py
+++ b/src/engine/SCons/Action.py
@@ -843,8 +843,8 @@ class CommandAction(_ActionAction):
         _ActionAction.__init__(self, **kw)
         if is_List(cmd):
             if [c for c in cmd if is_List(c)]:
-                raise TypeError("CommandAction should be given only " \
-                      "a single command")
+                raise TypeError("CommandAction should be given only "
+                                "a single command")
         self.cmd_list = cmd
 
     def __str__(self):