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pic(1): restore example section

It was erroneously elided when removing
the tpic command in commit 891a8c4f2.

--- a/sys/man/1/pic

+++ b/sys/man/1/pic

@@ -288,10 +288,34 @@

 The

 .B undef

 statement removes the definition of a macro.

+.SH EXAMPLES

+.EX

+arrow "input" above; box "process"; arrow "output" above

+move

+A: ellipse

+   circle rad .1 with .w at A.e

+   circle rad .05 at 0.5 <A.c, A.ne>

+   circle rad .065 at 0.5 <A.c, A.ne>

+   spline from last circle.nw left .25 then left .05 down .05

+   arc from A.c to A.se rad 0.5

+   for i = 1 to 10 do { line from A.s+.025*i,.01*i down i/50 }

+.EE

+.PP

+.PS

+arrow "input" above; box "process"; arrow "output" above

+move

+A: ellipse

+   circle rad .1 with .w at A.e

+   circle rad .05 at 0.5 <A.c, A.ne>

+   circle rad .065 at 0.5 <A.c, A.ne>

+   spline from last circle.nw left .25 then left .05 down .05

+   arc from A.c to A.se rad 0.5

+   for i = 1 to 10 do { line from A.s+.025*i,.01*i down i/50 }

+.PE

 .SH SOURCE

 .B /sys/src/cmd/pic

 .SH "SEE ALSO"

-.IR grap (1), 

+.IR grap (1),

 .IR doctype (1),

 .IR troff (1)

 .br