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Comparing rxvt-unicode/doc/rxvt.1.pod (file contents):
Revision 1.231 by root, Sat May 17 17:12:29 2014 UTC vs.
Revision 1.232 by root, Sun May 18 18:19:10 2014 UTC

1210use in this terminal instance; option B<-pe>. 1210use in this terminal instance; option B<-pe>.
1211 1211
1212Extension names can be prefixed with a C<-> sign to prohibit using 1212Extension names can be prefixed with a C<-> sign to prohibit using
1213them. This can be useful to selectively disable some extensions loaded 1213them. This can be useful to selectively disable some extensions loaded
1214by default, or specified via the C<perl-ext-common> resource. For 1214by default, or specified via the C<perl-ext-common> resource. For
1215example, C<default,-selection> will use all the default extension except 1215example, C<default,-selection> will use all the default extensions except
1216C<selection>. 1216C<selection>.
1217 1217
1218Some extensions define resources or command line switches, and will 1218The default set includes the C<selection>, C<option-popup>,
1219automatically be used when their resource or switch is specified. 1219C<selection-popup> and C<readline> extensions, any extensions that define
1220keybindings via C<BINDING> meta comments, extensions loaded because
1221their resources/commandline switches were used, and extensions which are
1222mentioned in B<keysym> resources.
1220 1223
1221Each extension is looked up in the library directories, loaded if 1224Each extension is looked up in the library directories, loaded if
1222necessary, and bound to the current terminal instance. 1225necessary, and bound to the current terminal instance. When the library
1226search path contains multiple extension files of the same name, then the
1227first one found will be used.
1223 1228
1224If both of these resources are the empty string, then the perl interpreter 1229If both of these resources are the empty string, then the perl interpreter
1225will not be initialized. The rationale for having two options is that 1230will not be initialized. The rationale for having two options is that
1226B<perl-ext-common> will be used for extensions that should be available to 1231B<perl-ext-common> will be used for extensions that should be available to
1227all instances, while B<perl-ext> is used for specific instances. 1232all instances, while B<perl-ext> is used for specific instances.

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