[darcs-devel] confusing hunk patch

[Tupshin Harper]

I noticed the following patch in the darcs source repository. Note the
position of the curly braces. The second hunk is nested inside an
additional layer of curly braces, but the first and third hunks are not.
Can someone explain the significance of this nesting?

Thanks.

-Tupshin

[Place /etc under $(PREFIX).
simons at cryp.to**Sun May 18 21:02:00 CEST 2003
 On my machine, all packages live in /usr/local/package, including
 their config files. This patch changes the Makefile to install the
 configuration in $(PREFIX)/etc rather than /etc, implementing exactly
 that.
] {
hunk ./Makefile 26
-       install -d $(DESTDIR)//etc/bash_completion.d/
-       install -m 0644 darcs_completion
$(DESTDIR)/etc/bash_completion.d/darcs
+       install -d $(DESTDIR)/$(PREFIX)/etc/bash_completion.d/
+       install -m 0644 darcs_completion
$(DESTDIR)/$(PREFIX)/etc/bash_completion.d/darcs
{
hunk ./Makefile 37
-       install -d $(DESTDIR)/etc/darcs
-       test -e $(DESTDIR)/etc/darcs/cgi.conf || \
-           install -m 0644 cgi.conf $(DESTDIR)/etc/darcs/cgi.conf
+v v v v v v v
+       install -d $(DESTDIR)/$(PREFIX)/etc/darcs
+       install -m 0644 cgi.conf $(DESTDIR)/$(PREFIX)/etc/darcs/cgi.conf
+*************
+       install -d $(DESTDIR)/etc/darcs
+       test -e $(DESTDIR)/etc/darcs/cgi.conf || \
+           install -m 0644 cgi.conf $(DESTDIR)/etc/darcs/cgi.conf
+^ ^ ^ ^ ^ ^ ^
}
hunk ./Makefile 48
-       rm $(DESTDIR)/etc/bash_completion.d/darcs
+       rm $(DESTDIR)/$(PREFIX)/etc/bash_completion.d/darcs
}