Fix a few Scaladoc warnings

Author: retronym

src/dotty/tools/dotc/ast/Desugar.scala

@@ -598,8 +598,8 @@ object desugar {
       }
     }
 
-    /** Create tree for for-comprehension <for (enums) do body> or
-     *   <for (enums) yield body> where mapName and flatMapName are chosen
+    /** Create tree for for-comprehension `<for (enums) do body>` or
+     *   `<for (enums) yield body>` where mapName and flatMapName are chosen
      *  corresponding to whether this is a for-do or a for-yield.
      *  The creation performs the following rewrite rules:
      *
@@ -638,7 +638,7 @@ object desugar {
      *        TupleN(x_1, ..., x_N)
      *      } ...)
      *
-     *    If any of the P_i are variable patterns, the corresponding `x_i @ P_i' is not generated
+     *    If any of the P_i are variable patterns, the corresponding `x_i @ P_i` is not generated
      *    and the variable constituting P_i is used instead of x_i
      *
      *  @param mapName      The name to be used for maps (either map or foreach)

src/dotty/tools/dotc/core/tasty/TastyReader.scala

@@ -11,7 +11,7 @@ import collection.mutable
  *  and that supports reading and patching addresses represented as natural numbers.
  *
  *  @param bytes    The array containing data
- *  @param from     The position from which to read
+ *  @param start    The position from which to read
  *  @param end      The position one greater than the last byte to be read
  *  @param base     The index referenced by the logical zero address Addr(0)
  */

src/dotty/tools/dotc/core/tasty/TreeUnpickler.scala

@@ -506,7 +506,7 @@ class TreeUnpickler(reader: TastyReader, tastyName: TastyName.Table) {
     }
 
     /** Create symbols the longest consecutive sequence of parameters with given
-     *  `tag starting at current address.
+     *  `tag` starting at current address.
      */
     def indexParams(tag: Int)(implicit ctx: Context) =
       while (nextByte == tag) createSymbol()