strutils.strip: improve the documentation; fixes #7159
strutils.strip: improve the documentation; fixes #7159

dom96/Nim,russpowers/Nim,russpowers/Nim,russpowers/Nim,dom96/Nim,russpowers/Nim,russpowers/Nim,dom96/Nim,russpowers/Nim,russpowers/Nim,dom96/Nim,dom96/Nim,dom96/Nim,dom96/Nim