Solve typo in README.md.
# Abstract
-**METACALL** is a library that allows calling functions, methods or procedures between programming languages. With **METACALL** you can execute transparently code from / to any programming language, for example, call Python code from JavaScript code.
+**METACALL** is a library that allows calling functions, methods or procedures between programming languages. With **METACALL** you can transparently execute code from / to any programming language, for example, call Python code from JavaScript code.
`sum.py`
``` python
