[gnumeric] DIGAMMA: Doc fix.

[Morten Welinder <mortenw src gnome org>]

commit 604266a2b2c6e3433e4b6cc0c704e7da89409b14
Author: Morten Welinder <terra gnome org>
Date:   Fri Jan 4 08:01:54 2019 -0500

    DIGAMMA: Doc fix.

 plugins/fn-math/functions.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/plugins/fn-math/functions.c b/plugins/fn-math/functions.c
index acc11fabb..983e214d2 100644
--- a/plugins/fn-math/functions.c
+++ b/plugins/fn-math/functions.c
@@ -1059,7 +1059,7 @@ gnumeric_gammaln (GnmFuncEvalInfo *ei, GnmValue const * const *argv)
 /***************************************************************************/
 
 static GnmFuncHelp const help_digamma[] = {
-       { GNM_FUNC_HELP_NAME, F_("GAMMA:the Digamma function")},
+       { GNM_FUNC_HELP_NAME, F_("DIGAMMA:the Digamma function")},
        { GNM_FUNC_HELP_ARG, F_("x:number")},
        { GNM_FUNC_HELP_EXAMPLES, "=DIGAMMA(1.46)" },
        { GNM_FUNC_HELP_EXAMPLES, "=DIGAMMA(15000)" },