docs: Fix a few typos

There are small typos in:
- jedi/api/exceptions.py
- jedi/inference/base_value.py
- jedi/inference/compiled/mixed.py
- jedi/inference/value/dynamic_arrays.py

Fixes:
- Should read `usually` rather than `ususally`.
- Should read `modifications` rather than `modfications`.
- Should read `interpreters` rather than `interpreteters`.
- Should read `inferred` rather than `inferrined`.
- Should read `completable` rather than `completeable`.

Signed-off-by: Tim Gates <tim.gates@iress.com>

jedi/inference/compiled/mixed.py

@@ -34,7 +34,7 @@ class MixedObject(ValueWrapper):
 
     This combined logic makes it possible to provide more powerful REPL
     completion. It allows side effects that are not noticable with the default
-    parser structure to still be completeable.
+    parser structure to still be completable.
 
     The biggest difference from CompiledValue to MixedObject is that we are
     generally dealing with Python code and not with C code. This will generate
@@ -267,7 +267,7 @@ def _find_syntax_node_name(inference_state, python_object):
 @inference_state_function_cache()
 def _create(inference_state, compiled_value, module_context):
     # TODO accessing this is bad, but it probably doesn't matter that much,
-    # because we're working with interpreteters only here.
+    # because we're working with interpreters only here.
     python_object = compiled_value.access_handle.access._obj
     result = _find_syntax_node_name(inference_state, python_object)
     if result is None: