Apply suggestions from code review

Co-authored-by: Taus <tausbn@github.com>

Author: yoff

python/ql/lib/semmle/python/dataflow/new/internal/DataFlowPrivate.qll

@@ -275,6 +275,7 @@ predicate runtimeJumpStep(Node nodeFrom, Node nodeTo) {
   // Module variable write
   nodeFrom = nodeTo.(ModuleVariableNode).getAWrite()
   or
+  // Setting the possible values of the variable at the end of import time
   exists(SsaVariable def |
     def = any(SsaVariable var).getAnUltimateDefinition() and
     def.getDefinition() = nodeFrom.asCfgNode() and

python/ql/test/experimental/dataflow/module-initialization/multiphase.py

@@ -24,7 +24,7 @@ def SINK_F(x):
     if is_source(x):  #$ runtimeFlow="ModuleVariableNode for multiphase.is_source, l:-24 -> is_source"
         print("Unexpected flow", x)  #$ runtimeFlow="ModuleVariableNode for multiphase.print, l:-25 -> print"
     else:
-        print("OK")  #$ Unexpected result: runtimeFlow="ModuleVariableNode for multiphase.print, l:-27 -> print"
+        print("OK")  #$ runtimeFlow="ModuleVariableNode for multiphase.print, l:-27 -> print"
 
 def set_foo():
     global foo