Merge pull request sarugaku#100 from brettcannon/patch-1

Some grammar fixes

src/resolvelib/providers.py

@@ -1,5 +1,5 @@
 class AbstractProvider(object):
-    """Delegate class to provide requirement interface for the resolver."""
+    """Delegate class to provide the required interface for the resolver."""
 
     def identify(self, requirement_or_candidate):
         """Given a requirement, return an identifier for it.
@@ -26,7 +26,7 @@ def get_preference(
         :param identifier: An identifier as returned by ``identify()``. This
             identifies the dependency matches of which should be returned.
         :param resolutions: Mapping of candidates currently pinned by the
-            resolver. Each key is an identifier, and the value a candidate.
+            resolver. Each key is an identifier, and the value is a candidate.
             The candidate may conflict with requirements from ``information``.
         :param candidates: Mapping of each dependency's possible candidates.
             Each value is an iterator of candidates.
@@ -42,7 +42,7 @@ def get_preference(
         * ``parent`` specifies the candidate that provides (dependend on) the
           requirement, or ``None`` to indicate a root requirement.
 
-        The preference could depend on a various of issues, including (not
+        The preference could depend on various of issues, including (not
         necessarily in this order):
 
         * Is this package pinned in the current resolution result?
@@ -61,7 +61,7 @@ def get_preference(
         raise NotImplementedError
 
     def find_matches(self, identifier, requirements, incompatibilities):
-        """Find all possible candidates that satisfy given constraints.
+        """Find all possible candidates that satisfy the given constraints.
 
         :param identifier: An identifier as returned by ``identify()``. This
             identifies the dependency matches of which should be returned.
@@ -92,7 +92,7 @@ def find_matches(self, identifier, requirements, incompatibilities):
     def is_satisfied_by(self, requirement, candidate):
         """Whether the given requirement can be satisfied by a candidate.
 
-        The candidate is guarenteed to have been generated from the
+        The candidate is guaranteed to have been generated from the
         requirement.
 
         A boolean should be returned to indicate whether ``candidate`` is a