fix #114: can't copy-paste ASCII character 160, non-breaking space. Now we...

fix #114: can't copy-paste ASCII character 160, non-breaking space. Now we only remove consecutive \u0020, and leave the non-breaking spaces alone

pd/nw/pd_canvas.js

@@ -38,7 +38,7 @@ function text_to_fudi(text) {
     text = text.replace(/(\$@)/g, "\\$@");         // escape special $@ sign
     text = text.replace(/(?!\\)(,|;)/g, " \\$1 "); // escape "," and ";"
     text = text.replace(/\{|\}/g, "");             // filter "{" and "}"
-    text = text.replace(/\s+/g, " ");              // filter consecutive /s
+    text = text.replace(/\u0020+/g, " ");          // filter consecutive ascii32
     return text;
 }