Fixed typo in documention for DOPS

src/crystdistrib/DopsShortcut.cpp

@@ -56,7 +56,7 @@ void DopsShortcut::registerKeywords( Keywords& keys ) {
   keys.add("atoms-2","SPECIESB","this keyword is used for colvars such as the coordination number.  It must appear with SPECIESA.  For a full explanation see "
            "the documentation for that keyword");
   keys.add("compulsory","KERNELFILE","the file containing the list of kernel parameters.  We expect h, mu and sigma parameters for a 1D Gaussian kernel of the form h*exp(-(x-mu)^2/2sigma^2)");
-  keys.add("compulsory","CUTOFF","6.25","to make the calculation faster we calculate a cutoff value on the distances.  The input to this keyword determines x in this expreession max(mu + sqrt(2*x)*sigma)");
+  keys.add("compulsory","CUTOFF","6.25","to make the calculation faster we calculate a cutoff value on the distances.  The input to this keyword determines x in this expreession max(mu + sqrt(2*x)/sigma)");
 }
 
 DopsShortcut::DopsShortcut(const ActionOptions&ao):