Fixing Python formatting issue

examples/hello/bpWriter/helloBPWriter.py

@@ -25,7 +25,7 @@ adios = adios2.ADIOS(comm, adios2.DebugON)
 bpIO = adios.DeclareIO("BPFile_N2N")
 bpIO.SetEngine('BPFileWriter')
 # bpIO.SetParameters( {"Threads" : "2", "ProfileUnits" : "Microseconds",
-#"InitialBufferSize" : "17Kb"} )
+# "InitialBufferSize" : "17Kb"} )
 bpIOParams = {}
 bpIOParams['Threads'] = '2'
 bpIOParams['ProfileUnits'] = 'Microseconds'
@@ -35,7 +35,7 @@ bpIO.SetParameters(bpIOParams)
 fileID = bpIO.AddTransport('File', {'Library': 'fstream'})
 
 # ADIOS Variable name, shape, start, offset, constant dims
-bpIO.DefineVariable(
+ioArray = bpIO.DefineVariable(
     "bpArray", [size * Nx], [rank * Nx], [Nx], adios2.ConstantDims)
 
 # ADIOS Engine