Fix some ambigous typos

Author: yarikoptic

CHANGELOG.md

@@ -439,7 +439,7 @@ Breaking changes:
 
 Breaking changes:
 
--   Remove deprecated `GIT_CREDTYPE_XXX` contants, use
+-   Remove deprecated `GIT_CREDTYPE_XXX` constants, use
     `GIT_CREDENTIAL_XXX` instead.
 -   Remove deprecated `Patch.patch` getter, use `Patch.text` instead.
 
@@ -536,7 +536,7 @@ Deprecations:
 
 -   Deprecate `Repository.create_remote(...)`, use instead
     `Repository.remotes.create(...)`
--   Deprecate `GIT_CREDTYPE_XXX` contants, use `GIT_CREDENTIAL_XXX`
+-   Deprecate `GIT_CREDTYPE_XXX` constants, use `GIT_CREDENTIAL_XXX`
     instead.
 
 # 1.2.0 (2020-04-05)

src/pygit2.c

@@ -290,7 +290,7 @@ PyDoc_STRVAR(filter_register__doc__,
     "\n"
     "`priority` defaults to GIT_FILTER_DRIVER_PRIORITY which imitates a core\n"
     "Git filter driver that will be run last on checkout (smudge) and first \n"
-    "on checkin (clean).\n"
+    "on check-in (clean).\n"
     "\n"
     "Note that the filter registry is not thread safe. Any registering or\n"
     "deregistering of filters should be done outside of any possible usage\n"