lintr v0.3.3

• infix_spaces_linter now properly checks = in named arguments. (#130, @saurfang).
• commas_linter now properly recognizes lints when preceded by a blank line and
  points to the missing space rather than the comma (#111, #129, @saurfang).
• Make spaces_left_parentheses_linter more robust when determining ( type (#128, @saurfang)
• commented_code_linter (#83, @jackwasey)
• Now trims long comments (#55, reported by @paulstaab)
• Automatic commenting of Github commits and pull requests when linting on Travis-CI
• expect_lint_free expectation can be added to testthat unit tests.
• Robust configuration system and exclusion logic
• Emacs and Sublime Text 3 plugins now available from their respective package repositories.
• add names.lints, split.lints (#49, @ttriche)
• Fixed bug that caused vim syntatic plugin not to work properly in windows (#46, @abossenbroek)
• allow lintr customization per project using .lintr config files.
• use globalenv() instead of baseenv() for default parent environment so
  that methods will be included.
• do not check object usage if eval fails. Fixes (#24, reported by @fabian-s)
• trailing_whitespace_linter was reporting the incorrect line number
• Use RStudio source marker API to display lints (#37, @jjallaire)
• Permit single quotes if they quote literal double quotes (#28, @jackwasey)
• nolint comments are respected with caching (#68, @krlmlr)
• Properly handle all knitr document formats
• Allow for (( when linting (#259, @nathaneastwood)
• Remove ^ from infix spaces to conform with tidyverse. (#302, @nathaneastwood)