Hyphenate "built-in" for consistency.
diff --git a/Doc/lib/libprofile.tex b/Doc/lib/libprofile.tex
index b7a1c1e..debb332 100644
--- a/Doc/lib/libprofile.tex
+++ b/Doc/lib/libprofile.tex
@@ -520,7 +520,7 @@
that it relies on the Python interpreter to dispatch \dfn{call},
\dfn{return}, and \dfn{exception} events. Compiled \C{} code does not
get interpreted, and hence is ``invisible'' to the profiler. All time
-spent in \C{} code (including builtin functions) will be charged to the
+spent in \C{} code (including built-in functions) will be charged to the
Python function that invoked the \C{} code. If the \C{} code calls out
to some native Python code, then those calls will be profiled
properly.