Rules: Make max-spaces-* generic

The goal being to use them in the 'colons', 'hyphens', 'commas', etc.
rules.

yamllint/rules/common.py

@@ -0,0 +1,34 @@
+# -*- coding: utf-8 -*-
+# Copyright (C) 2016 Adrien Vergé
+#
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+from yamllint.errors import LintProblem
+
+
+def max_spaces_after(nb, token, prev, next, description):
+    if (next is not None and token.end_mark.line == next.start_mark.line and
+            nb != - 1 and
+            next.start_mark.pointer - token.end_mark.pointer > nb):
+        return LintProblem(token.start_mark.line + 1, next.start_mark.column,
+                           description)
+
+
+def max_spaces_before(nb, token, prev, next, description):
+    if (prev is not None and
+            prev.end_mark.line == token.start_mark.line and
+            nb != - 1 and
+            prev.end_mark.pointer + nb < token.start_mark.pointer):
+        return LintProblem(token.start_mark.line + 1, token.start_mark.column,
+                           description)