Improve formatting

Author: gjbex

source-code/hydra/README.md

@@ -21,23 +21,25 @@ multiruns and so on.
 
 
 ## How to use it?
+
 Run with configuratino file settings:
 ```bash
 $ ./gen_rand.py
 ```
+
 To increase the number of random values:
 ```bash
-$ ./gen_rand.py n=10
+$ ./gen_rand.py  n=10
 ```
 
 To use a uniform distribution:
 ```bash
-$ ./gen_rand.py distr=uniform
+$ ./gen_rand.py  distr=uniform
 ```
 
 To use a uniform distribution between -1 and 0:
 ```bash
-$ ./gen_rand.py distr=uniform distr.a=-1.0 distr.b=0.0
+$ ./gen_rand.py  distr=uniform  distr.a=-1.0  distr.b=0.0
 ```
 
 To use a different configuration file:
@@ -53,6 +55,8 @@ To perform multiple runs with different parameter values:
 ```bash
 $ ./gen_rand.py -m distr=uniform,gauss
 ``` 
+Note that if multiple parameters are to be varied, the Cartesian product of
+the values will be used.
 
 To view the configuration settings, e.g., for debugging:
 ```bash