improve --keep-file option: default is auto = file will be kept, if it was present before the transformation

     1

syntax: glob

     2

     3

*~

     4

CMakeLists.txt.user

     5

     6

syntax: regexp

     7

     8

^temp/

     9

    10

^\.dep\.inc

    11

^dist/

    12

^build/

    13

^nbproject/private/