Address doc comment rot in the standard library.

- Match @param/@tparam names to the actual parameter name
- Use @tparam for type parameters
- Whitespace is required between `*` and `@`
- Fix incorrect references to @define macros.
- Use of monospace `` and {{{}}} (much more needed)
- Remove `@param p1 ...` stubs, which appear in the generated docss.
  - But, retainsed `@param p1` stubs, assuming they will be filtered from
    the generated docs by SI-5795.
- Avoid use of the shorthand `@param   doc for the solitary param`
  (which works, but isn't recognized by the code inspection in IntelliJ
  I used to sweep through the problems)

The remaining warnings from `ant docs` seem spurious, I suspect they are
an unintended consequence of documenting extension methods.

  [scaladoc] /Users/jason/code/scala/src/library/scala/collection/TraversableOnce.scala:181: warning: Variable coll undefined in comment for method reduceOption in class Tuple2Zipped
  [scaladoc]   def reduceOption[A1 >: A](op: (A1, A1) => A1): Option[A1] = reduceLeftOption(op)
  [scaladoc]       ^

1 files changed, 0 insertions, 3 deletions

diff --git a/src/library/scala/text/Document.scala b/src/library/scala/text/Document.scala
index c0a54799a3..6a0fca40ca 100644
--- a/src/library/scala/text/Document.scala
+++ b/src/library/scala/text/Document.scala
@@ -33,9 +33,6 @@ abstract class Document {
   /**
    * Format this document on `writer` and try to set line
    * breaks so that the result fits in `width` columns.
-   *
-   * @param width  ...
-   * @param writer ...
    */
   def format(width: Int, writer: Writer) {
     type FmtState = (Int, Boolean, Document)