Fix typo in calc.texi

* doc/misc/calc.texi (Programming Tutorial): Fix a typo.
Suggested by Vladimir Nikishkin <lockywolf@gmail.com>.

diff --git a/doc/misc/calc.texi b/doc/misc/calc.texi
index 4b62eee56e2d4d2bbd277daed67034b8f17e8e8d..3b525996d6f7d3a90c6bf7f80b5a4345047bbd5f 100644 (file)
--- a/doc/misc/calc.texi
+++ b/doc/misc/calc.texi
@@ -6217,7 +6217,7 @@ method when it is able.  @xref{Programming Answer 8, 8}. (@bullet{})
 @cindex Gamma constant, Euler's
 @cindex Euler's gamma constant
 (@bullet{}) @strong{Exercise 9.}  The @dfn{digamma} function
-@texline @math{\psi(z) (``psi'')}
+@texline @math{\psi(z)} (``psi'')
 @infoline @expr{psi(z)}
 is defined as the derivative of
 @texline @math{\ln \Gamma(z)}.