Fix some spelling mistakes (#436)

CHANGELOG.rst

@@ -231,7 +231,7 @@ No unreleased changes.
 15.2 - 2015-05-13
 ~~~~~~~~~~~~~~~~~
 
-* Fix an error where the arbitary specifier (``===``) was not correctly
+* Fix an error where the arbitrary specifier (``===``) was not correctly
   allowing pre-releases when it was being used.
 
 * Expose the specifier and version parts through properties on the

tests/test_requirements.py

@@ -140,7 +140,7 @@ def test_multiple_markers(self):
         marker = 'python_version < "2.7" and platform_version == "2"'
         self._assert_requirement(req, "name", extras=["strange", "quux"], marker=marker)
 
-    def test_multiple_comparsion_markers(self):
+    def test_multiple_comparison_markers(self):
         req = Requirement("name; os_name=='a' and os_name=='b' or os_name=='c'")
         marker = 'os_name == "a" and os_name == "b" or os_name == "c"'
         self._assert_requirement(req, "name", marker=marker)

tests/test_structures.py

@@ -43,7 +43,7 @@ def test_negative_infinity_lesser(left):
     assert left >= NegativeInfinity
 
 
-def test_infinty_equal():
+def test_infinity_equal():
     assert Infinity == Infinity
 
 

tests/test_tags.py

@@ -719,7 +719,7 @@ def test_get_elf_header(
     @pytest.mark.parametrize(
         "content", [None, "invalid-magic", "invalid-class", "invalid-data", "too-short"]
     )
-    def test_get_elf_header_bad_excutable(self, monkeypatch, content):
+    def test_get_elf_header_bad_executable(self, monkeypatch, content):
         if content:
             path = os.path.join(os.path.dirname(__file__), f"hello-world-{content}")
         else: