minor cleanup based on @david-i-berry review

C06.csv

@@ -29,7 +29,7 @@ CodeFigure,UnitType,Meaning,conventional,IA5-ASCII,ITA2,SIDefinition,Note,NoteID
 082,Derived SI units with special names,sievert,Sv,Sv,SV,m^2 s^-2,,,Operational
 110,"Other, non-SI, units recognized by CGPM",degree (angle),˚,deg,DEG,,(see Note 4),10,Operational
 111,"Other, non-SI, units recognized by CGPM",minute (angle),',',MNT,,,,Operational
-112,"Other, non-SI, units recognized by CGPM",second (angle),'','',SEC,,,,Operational
+112,"Other, non-SI, units recognized by CGPM",second (angle),"""","""",SEC,,,,Operational
 120,"Other, non-SI, units recognized by CGPM",litre,l or L,l or L,L,,,,Operational
 130,"Other, non-SI, units recognized by CGPM",minute (time),min,min,MIN,,,,Operational
 131,"Other, non-SI, units recognized by CGPM",hour,h,h,HR,,,,Operational
@@ -45,14 +45,14 @@ CodeFigure,UnitType,Meaning,conventional,IA5-ASCII,ITA2,SIDefinition,Note,NoteID
 220,Non-SI Units tolerated because of widespread use,hectare,ha,ha,HAR,,,,Operational
 230,Non-SI Units tolerated because of widespread use,week, ,,,,,,Operational
 231,Non-SI Units tolerated because of widespread use,year,a,a,A,,,,Operational
-300,Other Units as used by WMO,per cent,%,%,PERCENT,,,,Operational
+300,Other Units as used by WMO,per cent,%,%,PERCENT,,(see Note 7),21,Operational
 301,Other Units as used by WMO,parts per thousand,‰,0/00,PERTHOU,,,,Operational
 310,Other Units as used by WMO,eighths of cloud,okta,okta,OKTA,,,,Operational
 320,Other Units as used by WMO,degrees true,˚,deg,DEG,,,,Operational
 321,Other Units as used by WMO,degrees per second,degree/s,deg/s,DEG/S,,,,Operational
-350,Other Units as used by WMO,degrees Celsius,˚ C,C,C,,(see Note 8),13,Operational
-351,Other Units as used by WMO,degrees Celsius per metre,˚ C/m,C/m,C/M,,,,Operational
-352,Other Units as used by WMO,degrees Celsius per 100 metres,˚ C/100 m,C/100 m,C/100 M,,,,Operational
+350,Other Units as used by WMO,degrees Celsius,˚C,C,C,,(see Note 8),13,Operational
+351,Other Units as used by WMO,degrees Celsius per metre,˚C/m,C/m,C/M,,,,Operational
+352,Other Units as used by WMO,degrees Celsius per 100 metres,˚C/100 m,C/100 m,C/100 M,,,,Operational
 360,Other Units as used by WMO,Dobson Unit,DU,DU,DU,,(see Note 9),4,Operational
 430,Other Units as used by WMO,month,mon,mon,MON,,,,Operational
 441,Other Units as used by WMO,per second (same as hertz),s^-1,/s,/S,,,,Operational
@@ -71,15 +71,15 @@ CodeFigure,UnitType,Meaning,conventional,IA5-ASCII,ITA2,SIDefinition,Note,NoteID
 535,Other Units as used by WMO,nanobar = hPa 10^-6,nbar,nbar,NBAR,,,,Operational
 620,Other Units as used by WMO,grams per kilogram,g kg^-1,g/kg,G/KG,,,,Operational
 621,Other Units as used by WMO,grams per kilogram per second,g kg^-1 s^-1,g kg-1 s-1,,,,,Operational
-622,Other Units as used by WMO,kilograms per kilogram,kg kg^-1,kg/kg,,,,,Operational
+622,Other Units as used by WMO,kilograms per kilogram,kg kg^-1,kg/kg,KG/KG,,,,Operational
 623,Other Units as used by WMO,kilograms per kilogram per second,kg kg^-1 s^-1,kg kg-1 s-1,,,,,Operational
 624,Other Units as used by WMO,kilograms per square metre,kg m^-2,kg m-2,,,,,Operational
 630,Other Units as used by WMO,acceleration due to gravity,g,g,,,,,Operational
 631,Other Units as used by WMO,geopotential metre,gpm,gpm,,,,,Operational
 710,Other Units as used by WMO,millimetre,mm,mm,MM,,,,Operational
 711,Other Units as used by WMO,millimetres per seconds,mm s^-1,mm/s,MM/S,,,,Operational
 712,Other Units as used by WMO,millimetres per hour,mm h^-1,mm/h,MM/HR,,,,Operational
-713,Other Units as used by WMO,millimetres per the sixth power per cubic metre,mm^6 m^-3,mm6 m-3,,,,,Operational
+713,Other Units as used by WMO,millimetres to the sixth power per cubic metre,mm^6 m^-3,mm6 m-3,,,,,Operational
 715,Other Units as used by WMO,centimetre,cm,cm,CM,,,,Operational
 716,Other Units as used by WMO,centimetres per second,cm s^-1,cm/s,CM/S,,,,Operational
 717,Other Units as used by WMO,centimetres per hour,cm h^-1,cm/h,CM/HR,,,,Operational
@@ -100,7 +100,7 @@ CodeFigure,UnitType,Meaning,conventional,IA5-ASCII,ITA2,SIDefinition,Note,NoteID
 760,Other Units as used by WMO,metres per second squared,m s^-2,m s-2,,,,,Operational
 761,Other Units as used by WMO,square metres second,m^2 s,m2 s,,,,,Operational
 762,Other Units as used by WMO,square metres per second squared,m^2 s^-2,m2 s-2,,,,,Operational
-763,Other Units as used by WMO,square metres per radian squared,m^2 rad^-1 s,m2 rad-1 s,,,,,Operational
+763,Other Units as used by WMO,square metres per radian second,m^2 rad^-1 s,m2 rad-1 s,,,,,Operational
 764,Other Units as used by WMO,square metres per hertz,m^2 Hz^-1,m2/Hz,,,,,Operational
 765,Other Units as used by WMO,cubic metres,m^3,m3,,,,,Operational
 766,Other Units as used by WMO,cubic metres per second,m^3 s^-1,m3/s,,,,,Operational
@@ -138,7 +138,7 @@ CodeFigure,UnitType,Meaning,conventional,IA5-ASCII,ITA2,SIDefinition,Note,NoteID
 841,Other Units as used by WMO,pH unit,pH unit,pH unit,,,,,Operational
 842,Other Units as used by WMO,N units,N units,N units,,,,,Operational
 843,Other Units as used by WMO,Nephelometric turbidity units,NTU,,,,,,Operational
-844,Other Units as used by WMO,Total electron content unit,TECU,,,10^16 Electrons m^�2,,,
+844,Other Units as used by WMO,Total electron content unit,TECU,,,10^16 Electrons m^-2,,,
 na1,SI Unit prefixes,(yotta),(Y),(Y),(Y),,"(see Notes 1, 3 and 4)","19,9,10",
 na2,SI Unit prefixes,(zetta),(Z),(Z),(Z),,,,
 na3,SI Unit prefixes,exa,E,E,E,,,,