Fixed incorrect statement in README.

reaction-mailcreate/README.md

@@ -30,10 +30,10 @@ The script takes two files as input, namely (by default):
 (The `basedir` variable is set to `Mails` by default, while the `campaign`
 variable is set to `Test` by default.)
 
-In addition, `infix` needs to be specified on the command line as a
-positional parameter, but it can be empty (i. e., specified as `""`).  The
-idea is that this allows separate runs of the comms challenge to be clearly
-separated.
+In addition, an `infix` can to be specified on the command line as a
+positional parameter.  The idea is that this allows separate runs of the
+comms challenge to be clearly separated in the file names as well.  The
+default is empty.
 
 ### Mail Template
 
@@ -172,3 +172,8 @@ DFN-CERT,Tobias,Dussa,dussa@dfn-cert.de
    (for instance, just to send out a batch of mails without any intended
    web interaction), set to empty string (`""`).  Defaults to
    `https://challenge.example.com.
+
+
+## Example Calls
+
+###