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-rw-r--r--man/1/m412
1 files changed, 11 insertions, 1 deletions
diff --git a/man/1/m4 b/man/1/m4
index fcfb3e2d..dfab4fb0 100644
--- a/man/1/m4
+++ b/man/1/m4
@@ -77,9 +77,19 @@ Change quote characters to the first and second arguments.
without arguments restores the original values of
.BR `\|' .
.TP
+copydef
+The second argument is installed with the value of the macro
+named by the first argument,
+which may be a built-in macro.
+Typically both arguments are quoted to prevent too early expansion.
+A macro can be renamed using
+.B copydef
+followed by
+.BR undefine .
+.TP
define
The second argument is installed as the value of the macro
-whose name is the first argument.
+named by the first argument.
When the macro is later called (expanded),
each occurrence in the replacement text of
.BI $ n,