Flags to Modify Expansion

Sometimes you do not want to expand keywords (binary files!) or you just want the value instead of the keyword (exporting)

Need to supply -k flag to command. Possible values include:

b	Binary mode. No keyword expansion or newline conversion.
k	Keyword-only mode. Just the name of the keyword and no value.
v	Value-only mode. All keywords are completely replaced with their values. Note: This mode strips out the "$"'s around the keyword and they will no longer be expanded.

For example, in each version the "Id" keyword will be different. If you do not want to see the Id lines in a diff, use a line similar to:
```
$ cvs diff -r 1.104 -r 1.105 -kk userguide.sgml
```