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awk gsub command to replace multiple spaces

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# 1  
Old 06-29-2017
awk gsub command to replace multiple spaces
Hi Forum.

I'm trying to cleanup the following data elements (To remove any occurences of commas and any extra spaces) while preserving the <TAB> delimiter using awk gsub but I have not been successful.

Code:
Original Data:
4365 monte des source rue,,     ,<TAB>trevost<TAB>QC

Desired Data:
4365 monte des source rue<TAB>trevost<TAB>QC

Code:
I have tried the following but they don't give the desired results:

awk '{gsub(", *, *,\t","\t",$0); print;}'
awk '{gsub(", +, +,\t","\t",$0); print;}'

awk '{gsub(/, *, *,\t/,"\t",$0); print;}'
awk '{gsub(/, +, +,\t/,"\t",$0); print;}'

Can you please help?

Thanks.
# 2  
Old 06-29-2017
Hi, try:
Code:
awk '{sub(/[ ,]+$/,"",$1); print}' FS='\t' OFS='\t'

or

Code:
awk '{sub(/[ ,]+\t/,"\t"); print}'

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