Add printAll() cos I always seem to need it

src/ceylon/language/print.ceylon

@@ -1,15 +1,33 @@
-"Print a line to the standard output of the virtual 
- machine process, printing the given value\'s `string`, 
- or `\{#ab}null\{#bb}` if the value is `null`.
+"Print a line to the standard output of the virtual machine 
+ process, printing the given value\'s `string`, or `<null>` 
+ if the value is `null`.
  
  This method is a shortcut for:
  
-     process.writeLine(line?.string else \"\{#ab}null\{#bb}\")
+     process.writeLine(line?.string else \"<null>\")
  
  and is intended mainly for debugging purposes."
 // FIXME: see https://github.com/ceylon/ceylon-spec/issues/694
 //see (`process.writeLine`)
 by ("Gavin")
-shared void print(Anything line) { 
-    process.writeLine(line?.string else "\{#ab}null\{#bb}");
+shared void print(Anything val) =>
+        process.writeLine(stringify(val));
+
+"Print multiple values to the standard output of the virtual 
+ machine process as a single line of text, separated by a
+ given character sequence."
+by ("Gavin")
+shared void printAll({Anything*} values,
+        "A character sequence to use to separate the values"
+        String separator=", ") {
+    if (exists first = values.first) {
+        process.write(stringify(first));
+        for (val in values.rest) {
+            process.write(separator);
+            process.write(stringify(val));
+        }
+    }
+    process.write(process.newline);
 }
+
+String stringify(Anything val) => val?.string else "<null>";