chore: remove repeat words (#5053)

Signed-off-by: dashangcun <jchaodaohang@foxmail.com>
Co-authored-by: dashangcun <jchaodaohang@foxmail.com>
Co-authored-by: Zack Brunson <Zshooter@gmail.com>

src/test/csf/CollectorRef.h

@@ -40,7 +40,7 @@ namespace csf {
    level when adding to the simulation.
 
     The example code below demonstrates the reason for storing the collector
-    as a reference.  The collector's lifetime will generally be be longer than
+    as a reference.  The collector's lifetime will generally be longer than
     the simulation; perhaps several simulations are run for a single collector
     instance.  The collector potentially stores lots of data as well, so the
     simulation needs to point to the single instance, rather than requiring

src/test/csf/Digraph.h

@@ -220,7 +220,7 @@ public:
         @param fileName The output file (creates)
         @param vertexName A invokable T vertexName(Vertex const &) that
                           returns the name target use for the vertex in the file
-                          T must be be ostream-able
+                          T must be ostream-able
     */
     template <class VertexName>
     void