Forces 'exe' passed to API to be split internally if it is a string (…

…ie, it wasn't parsed by argparse)

.gitignore

@@ -3,3 +3,4 @@ build
 *.OU
 *.o[0-9]*
 *.pyc
+*.dat

python/wraprun/api.py

@@ -143,7 +143,7 @@ def add_task(self, string=None, **kwargs):
 
         EXAMPLES:
            add_task('-n 1,2,3 --w-cd ./a,./b,./c ./exe exe_arg')
-           add_task(pes=[1,2,3], cd=['./a','./b','./c'] ,exe='./exe exe_arg')
+           add_task(pes=[1,2,3], cd=['./a','./b','./c'], exe='./exe exe_arg')
 
         kwargs [kwarg (type): Description]:
            cd (str or [str,...]): Task working directory
@@ -165,6 +165,8 @@ def add_task(self, string=None, **kwargs):
         kwargs.update(
             {"first_" + k: v for k, v in self._rank_and_color.items()})
         self._parser.update(kwargs, string)
+        if hasattr(kwargs['exe'], 'split'):
+            kwargs['exe'] = kwargs['exe'].split()
         task_group = TaskGroup(**kwargs)
         self._rank_and_color = {
             k: v + 1 for k, v in task_group.last_rank_and_color().items()}