Fixed doc

[makedoc]

src/function/FuncSumHills.cpp

@@ -44,6 +44,10 @@ during your dynamics (it will crash!)
 In the future one could implement periodic integration during the metadynamics 
 or straightforward MD as a tool to check convergence
 
+\par Examples
+
+There are currently no examples for this keyword.
+
 */
 //+ENDPLUMEDOC
 

src/generic/DumpProjections.cpp

@@ -34,6 +34,18 @@ namespace generic{
 /*
 Dump the derivatives with respect to the input parameters for one or more objects (generally CVs, functions or biases).
 
+\par Examples
+
+Compute the distance between two groups and write on a file the
+derivatives of this distance with respect to all the atoms of the two groups
+
+\verbatim
+x1: CENTER ATOMS=1-10
+x2: CENTER ATOMS=11-20
+d: DISTANCE ATOMS=x1,x2
+DUMPPROJECTIONS ARG=d FILE=proj STRIDE=20
+\endverbatim
+
 */
 //+ENDPLUMEDOC