The tcl module for r-dorng will fail to load due to the [] characters in
the description. This happens for Tcl formatted modules loaded by Lmod
at least.
```
module load r-dorng-1.7.1-gcc-9.2.0-wtq7bne
Lmod has detected the following error: .../spack/share/spack/modules/linux-centos7-broadwell/r-dorng-1.7.1-gcc-9.2.0-wtq7bne:(r-dorng-1.7.1-gcc-9.2.0-wtq7bne):
invalid command name "L'Ecuyer"
```
Split text for short and long descriptions.
8eef488e2c