Sets the revision used to map a particular version of a system-wide source to a user-specific source.
If doesn't match, the system-wide source will be copied to the user-specific evolution config directory, preserving the already present fields that are not defined by the system-wide source.
If it matches, no copying is done.
The internal copy of revision is automatically stripped of leading and trailing whitespace.
| this | |
| revision |
a revision |