This pull request fixes the conflicts in the grammar in the current trunk. The present status of parsing/parser.mly is as follows:

boot/ocamlyacc -v -e parsing/parser.mly
1 rule never reduced
126 reduce/reduce conflicts.

Happily, the conflicts all have straightforward resolutions. The changes are as follows:

• The following productions are removed:

  pattern -> mod_longident DOT LPAREN pattern RPAREN
  pattern -> mod_longident DOT LPAREN pattern error
  pattern -> mod_longident DOT LPAREN error
  

  These productions are redundant because the RHSs can be generated via different routes:

  pattern ->
   pattern_gen ->
     simple_pattern ->
        simple_pattern_not_ident ->
           mod_longident DOT LPAREN pattern RPAREN
  

  (etc.)

• The following duplication is removed:

  simple_delimited_pattern -> LBRACE lbl_pattern_list error
  simple_delimited_pattern -> LBRACE lbl_pattern_list error
  

• The following redundancy

  simple_pattern_not_ident ->
    simple_delimited_pattern ->
       LBRACKET RBRACKET
  simple_pattern_not_ident ->
    constr_longident ->
       LBRACKET RBRACKET
  

  is replaced by removing the first production and adding a new production for qualified [] patterns:

  simple_pattern_not_ident -> mod_longident DOT LBRACKET RBRACKET