Update cy break examples

Updated cy break examples so they are more clear. 

docs/src/userguide/debugging.rst

@@ -94,19 +94,20 @@ of these commands are analogous to their respective gdb command.
     given::
 
         (gdb) cy break cython_function_or_method
-        (gdb) cy break packagename.modulename.cythonfunction
-        (gdb) cy break packagename.modulename.ClassName.cythonmethod
+        (gdb) cy break packagename.cython_module.cython_function
+        (gdb) cy break packagename.cython_module.ClassName.cython_method
         (gdb) cy break c_function
 
     You can also break on Cython line numbers::
 
-        (gdb) cy break packagename.modulename:14
         (gdb) cy break :14
+        (gdb) cy break cython_module:14
+        (gdb) cy break packagename.cython_module:14
 
     Python breakpoints currently support names of the module (not the entire
     package path) and the function or method::
 
-        (gdb) cy break -p pythonmodule.python_function_or_method
+        (gdb) cy break -p python_module.python_function_or_method
         (gdb) cy break -p python_function_or_method
 
 .. note:: Python breakpoints only work in Python builds where the Python frame