Tweak paths for correctness

standalone_examples/README.md

@@ -25,7 +25,7 @@ alongside your simulation.
 
 This directory contains a complete example. After you have compiled and
 installed morphologica, you should be able to change directory into
-schnakenberg, create a build directory and carry out a cmake build
+schnakenberg, create a build directory and carry out a cmake build:
 
 ```bash
 cd morphologica/standalone_examples/schakenberg
@@ -50,11 +50,11 @@ classes that Morphologica makes available. It demonstrates:
 * The morph::Tools class, which contains a collection of static
   utility functions.
 
-Run it as follows (I'm assuming you already built morphologica and then
-ran through the build instructions above):
+Run it as follows:
 
 ```bash
-./standalone_examples/build/schnakenberg ./examples/schnakenberg.json
+# The paths you use will depend on your current working directory:
+./standalone_examples/build/schnakenberg ./standalone_examples/schnakenberg/schnakenberg.json
 ```
 
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