*: Cosmetics + minor

Noticed while developing support for E-UTRAN IP Throughtput.

amari/kpi_test.py

@@ -72,7 +72,7 @@ class tLogMeasure:
     # _mok_init reinitializes ._mok with Measurement defaults.
     def _mok_init(t):
         t._mok = Measurement()
-        # init fields handled by amari.kpi to 0
+        # init fields extracted by amari.kpi from stats to 0
         # this will be default values to verify against
         for field in (
             'RRC.ConnEstabAtt.sum',
@@ -515,7 +515,7 @@ def test_LogMeasure_cc_wraparound():
     t.xlog( jstats(1, {}) )
     t.xlog( jstats(2, {cc: 13}) )
     t.xlog( jstats(3, {cc: 12}) )   # cc↓   - should be reported
-    t.xlog( jstats(4, {cc: 140}) )  # cc↑↑  - should should start afresh
+    t.xlog( jstats(4, {cc: 140}) )  # cc↑↑  - should start afresh
     t.xlog( jstats(5, {cc: 150}) )
 
     def readok(τ, CC_value):

amari/xlog.py

@@ -147,7 +147,7 @@ def xlog(ctx, wsuri, logspecv):
 
         time.sleep(3)
 
-
+# _XLogger serves xlog implementation.
 class _XLogger:
     def __init__(xl, wsuri, logspecv):
         xl.wsuri    = wsuri
@@ -155,6 +155,7 @@ class _XLogger:
 
     # emit saves line to the log.
     def emit(xl, line):
+        assert isinstance(line, str)
         assert '\n' not in line, line
         print(line, flush=True)
 

kpi.py

@@ -76,7 +76,7 @@ class Calc:
     pass
 
 
-# MeasurementLog represent journal of performed Measurements.
+# MeasurementLog represents journal of performed Measurements.
 #
 # It semantically consists of
 #