Use #deepCopy instead of #copy when copying RB parse tree
...because #copy make a copy if child nodes but does not set their parents properly.
Therefore node replacing does not work because it replaces it in wrong tree (original,
not the copy).
.svn
*.sc
*.c
*.sth
*.STH
*.@@@
objbc
objvc
*.res
ntLibInit.c
objmingw