CR 2375: time_type.py -- mark microseconds explicitly. Format test_ty…

…pe.py with Black. Add isoformat to spellcheck CI"

.github/actions/spelling/expect.txt

@@ -115,6 +115,7 @@ isdir
 isfile
 isinstance
 isnumeric
+isoformat
 Isr
 issubclass
 iterdir

src/fprime/common/models/serialize/time_type.py

@@ -289,10 +289,10 @@ def to_readable(self, time_zone=None):
 
         # If we could convert to a valid datetime, use that, otherwise, format
         if dt:
-            # datetime.isoformat() returns time string with microsecond 
+            # datetime.isoformat() returns time string with microsecond
             # precision.
             # This line can be changed for other precisions or needs.
-            return dt.isoformat()
+            return dt.isoformat(timespec="microseconds")
         return "%s: %d.%06ds, context=%d" % (
             TimeBase(self.__timeBase.val).name,
             self.__secs.val,

src/fprime/common/models/serialize/type_base.py

@@ -4,6 +4,7 @@
 @author: reder
 Replaced type base class with decorators
 """
+
 import abc
 
 from .type_exceptions import AbstractMethodException