more copy=None changes

Author: zm711

neo/core/analogsignal.py

@@ -223,7 +223,7 @@ def __init__(
         signal,
         units=None,
         dtype=None,
-        copy=True,
+        copy=None,
         t_start=0 * pq.s,
         sampling_rate=None,
         sampling_period=None,

neo/core/irregularlysampledsignal.py

@@ -205,7 +205,7 @@ def __init__(
         units=None,
         time_units=None,
         dtype=None,
-        copy=True,
+        copy=None,
         name=None,
         file_origin=None,
         description=None,

neo/test/iotest/test_brainwaresrcio.py

@@ -251,7 +251,7 @@ def proc_src_condition_unit_repetition(sweep, damaIndex, timeStamp, sweepLen, si
         timestamp=timeStamp,
         dama_index=damaIndex,
         side=side,
-        copy=True,
+        copy=None,
         respwin=respWin,
         waveforms=waveforms,
         file_origin=filename,