[exec.affine] Add missing '\placeholder'.

tkoeppe · tkoeppe · commit e5f877a4c054 · 2026-05-02T16:19:51.000+01:00
Misapplication of P3941R4 in LWG Motion 33.

Addresses editorial review committee feedback.
diff --git a/source/exec.tex b/source/exec.tex
@@ -7368,7 +7368,7 @@
 If \tcode{get_start_scheduler(get_env(\placeholder{out_rcvr}))} is ill-formed or
 does not satisfy \tcode{\exposconcept{infallible-scheduler}<Env>},
 then evaluation of
-the expression \tcode{get_completion_signatures<OutSndr, Env>()}
+the expression \tcode{get_completion_signatures<\placeholder{OutSndr}, Env>()}
 exits with an exception.
 Let \tcode{\placeholder{op}} be an lvalue referring to the operation state that
 results from connecting \tcode{\placeholder{out_sndr}} to \tcode{\placeholder{out_rcvr}}.
