Fix some typos (pythonGH-14435)

Misc/NEWS.d/3.8.0a1.rst

@@ -550,7 +550,7 @@ The *lineno* and *col_offset* attributes of the AST for decorated function
 and class refer now to the position of the corresponding ``def``, ``async
 def`` and ``class`` instead of the position of the first decorator. This
 leads to more correct line reporting in tracing. This is the only case when
-the position of child AST nodes can preceed the position of the parent AST
+the position of child AST nodes can precede the position of the parent AST
 node.
 
 ..
@@ -2366,7 +2366,7 @@ running external programs like ``cmd /c ver``.
 
 Previously, calling the strftime() method on a datetime object with a
 trailing '%' in the format string would result in an exception. However,
-this only occured when the datetime C module was being used; the python
+this only occurred when the datetime C module was being used; the python
 implementation did not match this behavior. Datetime is now PEP-399
 compliant, and will not throw an exception on a trailing '%'.
 
@@ -5278,7 +5278,7 @@ Improved error handling and fixed a reference leak in
 .. nonce: zncfvW
 .. section: Library
 
-Deleting a key from a read-only dbm database raises module specfic error
+Deleting a key from a read-only dbm database raises module specific error
 instead of KeyError.
 
 ..

Misc/NEWS.d/3.8.0a3.rst

@@ -173,7 +173,7 @@ Update Unicode databases to version 12.0.0.
 .. nonce: dZemNt
 .. section: Core and Builtins
 
-Fix a segfault occuring when sorting a list of heterogeneous values. Patch
+Fix a segfault occurring when sorting a list of heterogeneous values. Patch
 contributed by Rémi Lapeyre and Elliot Gorokhovsky.
 
 ..

Misc/NEWS.d/3.8.0b1.rst

@@ -1613,7 +1613,7 @@ versions.
 .. section: Documentation
 
 Improve documentation of the stdin, stdout, and stderr arguments of of the
-``asyncio.subprocess_exec`` function to specficy which values are supported.
+``asyncio.subprocess_exec`` function to specify which values are supported.
 Also mention that decoding as text is not supported.
 
 Add a few tests to verify that the various values passed to the std*

Modules/_abc.c

@@ -554,7 +554,7 @@ _abc__abc_instancecheck_impl(PyObject *module, PyObject *self,
 }
 
 
-// Return -1 when exception occured.
+// Return -1 when exception occurred.
 // Return 1 when result is set.
 // Return 0 otherwise.
 static int subclasscheck_check_registry(_abc_data *impl, PyObject *subclass,
@@ -666,7 +666,7 @@ _abc__abc_subclasscheck_impl(PyObject *module, PyObject *self,
 
     /* 5. Check if it's a subclass of a registered class (recursive). */
     if (subclasscheck_check_registry(impl, subclass, &result)) {
-        // Exception occured or result is set.
+        // Exception occurred or result is set.
         goto end;
     }
 

Modules/mathmodule.c

@@ -1552,7 +1552,7 @@ prove that after that line is executed, we have
 
     (a - 1)**2 < (n >> 2*(c - d)) < (a + 1)**2
 
-To faciliate the proof, we make some changes of notation. Write `m` for
+To facilitate the proof, we make some changes of notation. Write `m` for
 `n >> 2*(c-d)`, and write `b` for the new value of `a`, so
 
     b = (a << d - e - 1) + (n >> 2*c - e - d + 1) // a