我需要将一个字符串"-\n \302\240"变成"-"
irb(main):248:0> "-\n \302\240"
=> "-\n \302\240"
irb(main):249:0> "-\n \302\240".gsub('\n','')
=> "-\n \302\240"
irb(main):250:0> "-\n \302\240".gsub('\n','')
=> "-\n \302\240"
irb(main):251:0> "-\n \302\240".gsub('\n','')
=> "-\n \302\240"
irb(main):252:0> "-\n \302\240".gsub('\n','').gsub('\302\240','')
=> "-\n \302\240"
irb(main):253:0> "-\n \302\240".gsub('\n','').gsub('\302\240','')
=> "-\n \302\240"
irb(main):254:0> "-\n \302\240".chomp
=> "-\n \302\240"
irb(main):255:0> "-\n \302\240".strip
=> "-\n \302\240"
怎么折腾都不行，请问应当如何做？
[code="java"]irb(main):032:0> "-\n \302\240".gsub(/\n.*\302\240/,'')
=> "-"[/code]