Fixed commands separator and associated test

Author: Sylvain MARIE

doit_api/main.py

@@ -1021,7 +1021,7 @@ def _procline(l):
     return [l for l in lines if len(l) > 0]
 
 
-OS_CMD_SEP = ' & ' if platform.system() == 'Windows' else ' ; '
+OS_CMD_SEP = '& ' if platform.system() == 'Windows' else '; '
 
 
 def join_cmds(cmds_list):

doit_api/tests/core/test_task_and_taskgen.py

@@ -102,7 +102,7 @@ def d_():
         assert len(task_d) == 1
         task_d = task_d[0]
         assert len(task_d.actions) == 2
-        _sep = ' & ' if platform.system() == 'Windows' else ' ; '
+        _sep = '& ' if platform.system() == 'Windows' else '; '
         assert task_d.actions[1]._action.split(_sep) == ["echo ola", "echo hey"]
 
     # ---- checks : list
@@ -143,7 +143,7 @@ def d_():
     with capsys.disabled():
         assert captured.out.replace("\r", "") == """hello !
 hello !!
-ola 
+ola
 hey
 Running <Task: c:echo> because one of its targets does not exist: 'hoho.txt'
 hi
@@ -193,7 +193,7 @@ def d_():
         with capsys.disabled():
             assert captured.out.replace("\r", "") == """hello !
 hello !!
-ola 
+ola
 hey
 Running <Task: c:echo> because one of its targets does not exist: 'hoho.txt'
 hi