From f463241de0330a16d6943153c9a622031e2cb32a Mon Sep 17 00:00:00 2001
From: Maximilian Antoni <mail@maxantoni.de>
Date: Tue, 7 Aug 2018 14:16:58 +0200
Subject: [PATCH] Fix isFunction failure message differences

The toString representation of functions has changed slightly between
Node 8 and Node 10. Node 10 retains the original whitespace between
the function keyword and the opening braces while Node 8 always inserts
a blank.
---
 lib/assertions/is-function.js | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/lib/assertions/is-function.js b/lib/assertions/is-function.js
index 0d613e2d..fe3a82a9 100644
--- a/lib/assertions/is-function.js
+++ b/lib/assertions/is-function.js
@@ -11,7 +11,9 @@ module.exports = function(referee) {
         expectation: "toBeFunction",
         values: function(actual, message) {
             return {
-                actual: String(actual).replace("\n", ""),
+                actual: String(actual)
+                    .replace("function(", "function (")
+                    .replace("\n", ""),
                 actualType: typeof actual,
                 customMessage: message
             };