ENH: reproin - log applied substitutions

Example of the log now

    heudiconv/heuristics/test_reproin.py::test_fix_dbic_protocol INFO: Considering study (0e4497bdaae2608324a85be1f54f60ed) specific substitutions
    INFO:  field1: '02-anat-scout_run+_MPR_sag' -> '02-anat-THESCOUT_MPR_sag'
    INFO: Considering global substitutions
    INFO:  field1: '02-anat-THESCOUT_MPR_sag' -> '02-anat-scout_MPR_sag'
    INFO: Considering study (0e4497bdaae2608324a85be1f54f60ed) specific substitutions
    INFO:  field2: '11-func_run-life2_acq-2mm692' -> '11-func_run+_task-life_acq-2mm692'
    INFO: Considering global substitutions

Author: yarikoptic

heudiconv/heuristics/reproin.py

@@ -412,10 +412,12 @@ def fix_dbic_protocol(seqinfo):
             fixed_kwargs = dict()
             # need to replace both protocol_name series_description
             for key in series_spec_fields:
-                value = getattr(s, key)
+                oldvalue = value = getattr(s, key)
                 # replace all I need to replace
                 for substring, replacement in substitutions:
                     value = re.sub(substring, replacement, value)
+                if oldvalue != value:
+                    lgr.info(" %s: %r -> %r", key, oldvalue, value)
                 fixed_kwargs[key] = value
             # namedtuples are immutable
             seqinfo[i] = s._replace(**fixed_kwargs)