Merged from trunk 7903:7908

   Merged from trunk 7903:7908

   | 7904     | In the EbuildQuote check, combine the var_assignment regex  |
   | zmedico  | together with the ignore_line regex. This also fixes an     |
   |          | issue with the var_assignment regex allowing violations     |
   |          | like `make DESTDIR=${D}` to slip through.                   |

   | 7905     | Eliminate confusing false positive error messages for       |
   | zmedico  | SRC_URI.syntax and digestentry.unused that are reported     |
   |          | when the SRC_URI for one or more ebuilds can't be parsed    |
   |          | for some reason. There's no point in producing a false      |
   |          | error here since the root cause will produce a valid error  |
   |          | elsewhere, such as "SRC_URI.syntax" or "ebuild.sytax".      |
   |          | Also, update the docs for the "ebuild.syntax" error to      |
   |          | indicate that a digest verification failure can trigger it. |

   | 7907     | this isnt part of gentoolkit anymore                        |
   | SpankMan |                                                             |

   | 7908     | no need to use "function" when defining a function          |
   | SpankMan |                                                             |

svn path=/main/branches/prefix/; revision=7953