Blank preconfig update and some docstring fixes.

Author: sgiavasis

CPAC/func_preproc/func_preproc.py

@@ -1003,8 +1003,8 @@ def func_despike(wf, cfg, strat_pool, pipe_num, opt=None):
     {"name": "func_despike",
      "config": ["functional_preproc", "despiking"],
      "switch": ["run"],
-     "option_key": "space",
-     "option_val": "native",
+     "option_key": ["space"],
+     "option_val": ["native"],
      "inputs": ["desc-preproc_bold"],
      "outputs": {
          "desc-preproc_bold": {
@@ -1035,8 +1035,8 @@ def func_despike_template(wf, cfg, strat_pool, pipe_num, opt=None):
     {"name": "func_despike_template",
      "config": ["functional_preproc", "despiking"],
      "switch": ["run"],
-     "option_key": "space",
-     "option_val": "template",
+     "option_key": ["space"],
+     "option_val": ["template"],
      "inputs": ["space-template_desc-preproc_bold"],
      "outputs": {
          "space-template_desc-preproc_bold": {

CPAC/pipeline/schema.py

@@ -630,7 +630,7 @@ def sanitize(filename):
             'scaling_factor': Number
         },
         'despiking': {
-            'run': forkable
+            'run': forkable,
             'space': In({'native', 'template'})
         },
         'slice_timing_correction': {

CPAC/resources/configs/pipeline_config_blank.yml

@@ -1192,6 +1192,8 @@ functional_preproc:
     #   run: [On, Off] - this will run both and fork the pipeline
     run: [Off]
 
+    space: 'native'
+
 nuisance_corrections:
   2-nuisance_regression: