Time for an 2014 update…

Task/Comments/Deja-Vu/comments.djv

@@ -0,0 +1,2 @@
+#this is a comment
+!print "this is not a comment, obviously" #this is a comment as well

Task/Comments/Neko/comments.neko

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+// Single line comment, of course!
+/*
+Multi line comment!
+*/

Task/Comments/Nimrod/comments.nimrod

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+# Nimrod supports only single-line comments
+
+var x = 0 ## Documentation comments start with double hash characters.
+
+var y = 0 ## Comments are a proper part of the syntax and are indentation sensitive.
+          ## If the next line only consists of a comment piece, it must be aligned
+          ## either to the preceding one (documentation generator would merge these lines)
+## or to the code block (starting a new comment piece).
+
+  # any misaligned comment line (like this one) would trigger an "invalid indentation" error
+
+var z = 0 ## Alternatively you can end the preceding comment piece with a backslash \
+  ## to reset alignment to any column you like.
+  ## See also http://nimrod-code.org/tut1.html#comments

Task/Comments/Rust/comments.rust

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+// A single line comment
+
+/*
+    This is a multi-line (aka block) comment
+
+    /*
+        containing nested multi-line comment
+        (nesting supported since 0.9-pre https://github.com/mozilla/rust/issues/9468)
+    */
+*/
+
+
+/// Outer single line Rustdoc comments apply to the next item.
+
+/**
+    Outer multi-line Rustdoc comments.
+
+ *  Leading asterisk (*) in multi-line Rustdoc comments
+ *  is not considered to be part of the comment text,
+ *  blanks and tabs preceding the initial asterisk (*) are also stripped.
+*/
+
+fn example() {
+
+    //! Inner single line Rustdoc comments apply to their enclosing item.
+
+    /*!
+        Inner multi-line Rustdoc comments.
+        See also https://github.com/mozilla/rust/wiki/Doc-using-rustdoc
+    */
+}
+
+#[doc = "Unsugared outer Rustdoc comments.
+        (outer attributes are not terminated by a semi-colon)"]
+fn example() {
+    #[doc = "Unsugared inner Rustdoc comments.
+            (inner attributes are terminated by a semi-colon)
+            See also https://github.com/mozilla/rust/blob/master/doc/rust.md#attributes"];
+}