Escaping of selected characters doesn't work

This is related to the FORGE-43 issue.

The following characters in file names should be escaped by the forge completion:

* ? = ' " { } \ $ ! & ; ( ) < > |

also: TAB-char (yes, I know it is stupid, but possible)

First two (*, ?) are used internally as wildcard chars, so should be allowed to be used escaped as well as unescaped.

= char doesn't need to be escaped neither on linux nor on windows but somehow forge fails to work with files containing = (at least on my ubuntu).

Windows has a slightly different set of chars to be escaped (from wikipedia, not actually tested):

' " = & | ( ) < > ^

This issue is added for completeness.