Changed the remainder operator from '%' to '^/', mainly because '%' must be allowed in MACRO-10 symbols instead, but also because '%' led one to believe it was a "mod" operator (it wasn't); added IFDEF support to the MACRO-10 Mini-Assembler; updated the Debugger's assemble command to recognize filenames with "KLM" extensions, too.

modules/pdp10/lib/debugger.js

@@ -2642,7 +2642,7 @@ class DebuggerPDP10 extends Debugger {
             return true;
         }
 
-        var match = sOpcode.match(/^(['"]?)(.*\.mac|.*\.html|.*\.txt)\1$/i);
+        var match = sOpcode.match(/^(['"]?)(.*\.klm|.*\.mac|.*\.html|.*\.txt)\1$/i);
         if (match) {
             var dbg = this;
             var cpu = this.cpu;