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Regular Expression
r"
m=(\w+)
"
Input 1
New
2016-03-08 11:23:25 test_data:0317: m=string_I_want max_count: 17655, avg_size: 320, avg_rate: 165
Substitution
2016-03-08 11:23:25 test_data:0317: m=string_I_want max_count: 17655, avg_size: 320, avg_rate: 165