Strip out extraneous whitespace, cast a some `const char *` to `void *` when

passed to free() and make a `char *` to a `const char *` as found by Clang's
static analyzer.

Modules/readline.c

@@ -378,7 +378,7 @@ py_remove_history(PyObject *self, PyObject *args)
 	}
 	/* free memory allocated for the history entry */
 	if (entry->line)
-		free(entry->line);
+		free((void *)entry->line);
 	if (entry->data)
 		free(entry->data);
 	free(entry);
@@ -415,7 +415,7 @@ py_replace_history(PyObject *self, PyObject *args)
 	}
 	/* free memory allocated for the old history entry */
 	if (old_entry->line)
-	    free(old_entry->line);
+	    free((void *)old_entry->line);
 	if (old_entry->data)
 	    free(old_entry->data);
 	free(old_entry);
@@ -1023,7 +1023,7 @@ call_readline(FILE *sys_stdin, FILE *sys_stdout, char *prompt)
 	/* we have a valid line */
 	n = strlen(p);
 	if (n > 0) {
-		char *line;
+		const char *line;
 		HISTORY_STATE *state = history_get_history_state();
 		if (state->length > 0)
 #ifdef __APPLE__