Added support for Ruby bang methods. Bang methods end in exclamation points and indicate that the object being worked on will be modified in-place as opposed to being copied.

git-svn-id: https://swig.svn.sourceforge.net/svnroot/swig/trunk@8441 626c5289-ae23-0410-ae9c-e8d60b6d4f22

SWIG/Source/Modules/ruby.cxx

@@ -965,7 +965,7 @@ public:
    * predicate methods that return true or false (e.g. Array#empty?).
    *
    * Methods whose names end with exclamation points are, by convention,
-   * "mutators" that modify the instance in place (e.g. Array#sort!).
+   * called bang methods that modify the instance in place (e.g. Array#sort!).
    *
    * Methods whose names end with an equals sign are attribute setters
    * (e.g. Thread#critical=).
@@ -1038,6 +1038,11 @@ public:
       Append(symname, "?");
     }
 
+    /* Rename bang methods */
+    if (GetFlag(n, "feature:bang")) {
+      Append(symname, "!");
+    }
+
     /* Determine the name of the SWIG wrapper function */
     String *wname = Swig_name_wrapper(symname);
     if (overname && current != CONSTRUCTOR_ALLOCATE) {