Fix luacheck: ignore not filtering out warnings 5xx and 314

Ref #71.

Author: mpeterv

spec/check_spec.lua

@@ -755,6 +755,19 @@ return foo;
       ]])
    end)
 
+   it("marks ignored warnings as filtered", function()
+      assert.same({
+         {code = "211", name = "foo", filtered = true, line = 1, column = 7, end_column = 9},
+         {code = "211", name = "bar", line = 1, column = 12, end_column = 14},
+         {code = "512", filtered = true, line = 2, column = 1, end_column = 3},
+         {code = "213", name = "_", filtered = true, line = 2, column = 5, end_column = 5},
+         {code = "113", name = "pairs", filtered_113 = true, line = 2, column = 10, end_column = 14},
+      }, check[[
+local foo, bar -- luacheck: ignore foo
+for _ in pairs({}) do return end -- luacheck: ignore
+      ]])
+   end)
+
    it("handles argparse sample", function()
       assert.table(check(io.open("spec/samples/argparse.lua", "rb"):read("*a")))
    end)

src/luacheck/filter.lua

@@ -166,7 +166,7 @@ local function is_enabled(rules, warning)
       for _, pattern in ipairs(rule[1]) do
          local matches_code, matches_name = match(warning, pattern)
 
-         -- If a factor is enabled, warning can't be disable by it.
+         -- If a factor is enabled, warning can't be disabled by it.
          if enabled_code then
             matches_code = rule[2] ~= "disable"
          end
@@ -190,7 +190,7 @@ local function is_enabled(rules, warning)
             end
 
             if enabled_code and enabled_name then
-               -- Enable as matching to some `enable` pattern by code and to other by name.
+               -- Enable as matching to some `enable` pattern by code and to another by name.
                return true
             end
          elseif rule[2] == "disable" then

src/luacheck/inline_options.lua

@@ -51,7 +51,7 @@ local function get_options(body)
 
          opts.std = args[1]
       elseif name == "ignore" and #args == 0 then
-         opts.ignore = {".*/.*"}
+         opts.ignore = {".*"}
       else
          local flag = true