'Hello ' become 'Hello' from Cookbook (adding-instance-properties.md)

[MachinisteWeb]

From the /src/v2/cookbook/adding-instance-properties.md we can see at line 116 the following code message: 'Hello ' (with a space) but to the line 119 the result is "Hello" (without space).

Actually we have changed that in the french translation for set 'Hello' at line 119.

We suggest to do the same ;)