Add a bunch of additional test cases for `ArcanistTextLinter`

Summary: Self-explanatory, improve test coverage.

Test Plan: Wrote and executed unit tests.

Reviewers: #blessed_reviewers, epriestley

Reviewed By: #blessed_reviewers, epriestley

Subscribers: epriestley, Korvin

Differential Revision: https://secure.phabricator.com/D10474
Fix failing unit test

I goofed this up... I think my editor trimmed the trailing whitespace for me.

Auditors: epriestley
Minor reordering of functions

Summary: This seems somewhat neater to me, YMMV.

Test Plan: N/A

Reviewers: epriestley, #blessed_reviewers

Reviewed By: epriestley, #blessed_reviewers

Subscribers: epriestley, Korvin

Differential Revision: https://secure.phabricator.com/D10468
Explicitly enumerate PHP magic methods

Summary: Explicitly list PHP magic methods (methods beginning with `__`) instead of assuming that //all// methods beginning with `__` are okay in terms of naming conventions. These magic methods were obtained from http://us1.php.net/manual/en/language.oop5.magic.php.

Test Plan:
```
   Warning  (XHP9) Naming Conventions
    Follow naming conventions: methods should be named using lowerCamelCase.

               1 <?php
               2
               3 class Foo {
    >>>        4     function __foo() {}
               5
               6     function _bar() {}
               7 }

   Warning  (XHP9) Naming Conventions
    Follow naming conventions: methods should be named using lowerCamelCase.

               3 class Foo {
               4     function __foo() {}
               5
    >>>        6     function _bar() {}
               7 }
```

Reviewers: #blessed_reviewers, epriestley

Reviewed By: #blessed_reviewers, epriestley

Subscribers: epriestley, Korvin

Differential Revision: https://secure.phabricator.com/D10539
`pht`ize some strings

Summary: Self explanatory.

Test Plan: N/A

Reviewers: epriestley, #blessed_reviewers

Reviewed By: epriestley, #blessed_reviewers

Subscribers: epriestley, Korvin

Differential Revision: https://secure.phabricator.com/D10536
Improve `LINT_DOS_NEWLINE` behavior

Summary: Improve the behavior of `ArcanistTextLinter` in dealing with `LINT_DOS_NEWLINE`. In particular, provide replacement text so that these linter issues can be autofixed.

Test Plan: Added a unit test.

Reviewers: #blessed_reviewers, epriestley

Reviewed By: #blessed_reviewers, epriestley

Subscribers: epriestley, Korvin

Differential Revision: https://secure.phabricator.com/D10472
Fix a fatal error in `ArcanistXHPASTLinter`

Summary: I had assumed that we would always be interested in `n_STATEMENT_LIST`, which is fine for `if (...) { some_statements(); }` but not for `if (...) one_statement();`.

Test Plan: Added a test case.

Reviewers: epriestley, #blessed_reviewers

Reviewed By: epriestley, #blessed_reviewers

Subscribers: epriestley, Korvin

Differential Revision: https://secure.phabricator.com/D10551
Add a linter rule for array separators

Summary:
Adds a rule to `ArcanistXHPASTLinter` which ensures that:

# Single-lined arrays //do not// contain an unnecessary trailing comma separator after the final array value.
# Multi-lined arrays //do// contain a trailing comma seperator after the final value value.

Depends on D10534.

Test Plan: Wrote and executed unit tests.

Reviewers: #blessed_reviewers, epriestley

Reviewed By: #blessed_reviewers, epriestley

Subscribers: epriestley, Korvin

Differential Revision: https://secure.phabricator.com/D10535
Fix incorrect linter code being raised

Summary: `ArcanistXHPASTLinter::lintSpaceAroundConcatenationOperators` should raise `LINT_CONCATENATION_OPERATOR`, not `LINT_BINARY_EXPRESSION_SPACING`.

Test Plan: N/A

Reviewers: epriestley, #blessed_reviewers

Reviewed By: epriestley, #blessed_reviewers

Subscribers: epriestley, Korvin

Differential Revision: https://secure.phabricator.com/D10553
Fix `LINT_ARRAY_SEPARATOR` for nested arrays

Summary: The `LINT_ARRAY_SEPARATOR` rule was added to `ArcanistXHPASTLinter` in D10535. Unfortunately, it does not correctly handle nested arrays correctly. This patch fixes this. Depends on D10554.

Test Plan: Added a test case.

Reviewers: epriestley, #blessed_reviewers

Reviewed By: epriestley, #blessed_reviewers

Subscribers: epriestley, Korvin

Differential Revision: https://secure.phabricator.com/D10558
Fix `LINT_ARRAY_SEPARATOR` for heredocs

Summary: It is not correct to add a trailing comma if the `n_ARRAY_VALUE` node is a heredoc string.

Test Plan: Added a test case.

Reviewers: epriestley, #blessed_reviewers

Reviewed By: epriestley, #blessed_reviewers

Subscribers: epriestley, Korvin

Differential Revision: https://secure.phabricator.com/D10569
Add a linter rule to detect variable arguments for `break` and `continue`

Summary: In PHP 5.4, the `break` and `continue` statements no longer accept variable arguments (e.g., `break 1 + foo() * $bar;`). Static arguments still work, such as break 2;. As a side effect of this change `break 0;` and `continue 0;` are no longer allowed.

Test Plan: Added some test cases.

Reviewers: epriestley, #blessed_reviewers

Reviewed By: epriestley, #blessed_reviewers

Subscribers: epriestley, Korvin

Differential Revision: https://secure.phabricator.com/D10567
Minor linter fixes

Summary: Apply some linter autofixes.

Test Plan: `arc lint` and `arc unit`

Reviewers: #blessed_reviewers, epriestley

Reviewed By: #blessed_reviewers, epriestley

Subscribers: epriestley, Korvin

Differential Revision: https://secure.phabricator.com/D10568