diff --git a/README.md b/README.md
index 04cdd49d..c1b6a789 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,6 @@
 # PyO3 [![Build Status](https://travis-ci.org/PyO3/pyo3.svg?branch=master)](https://travis-ci.org/PyO3/pyo3) [![Build Status](https://ci.appveyor.com/api/projects/status/github/PyO3/pyo3?branch=master&svg=true)](https://ci.appveyor.com/project/fafhrd91/pyo3) [![codecov](https://codecov.io/gh/PyO3/pyo3/branch/master/graph/badge.svg)](https://codecov.io/gh/PyO3/pyo3) [![crates.io](http://meritbadge.herokuapp.com/pyo3)](https://crates.io/crates/pyo3) [![Join the dev chat](https://img.shields.io/gitter/room/nwjs/nw.js.svg)](https://gitter.im/PyO3/Lobby)
 
-[Rust](http://www.rust-lang.org/) bindings for the [python](https://www.python.org/) interpreter.
+[Rust](http://www.rust-lang.org/) bindings for the [Python](https://www.python.org/) interpreter.
 
 * [User Guide](https://pyo3.github.io/pyo3/guide/)
 * [API Documentation](http://pyo3.github.io/pyo3/pyo3/)
@@ -13,7 +13,7 @@ Python is licensed under the [Python License](https://docs.python.org/2/license.
 
 Supported Python versions:
 
-* Python2.7, Python 3.5 and up
+* Python 2.7, Python 3.5 and up
 
 Supported Rust version:
 
diff --git a/guide/src/class.md b/guide/src/class.md
index 2b915161..5ee8c495 100644
--- a/guide/src/class.md
+++ b/guide/src/class.md
@@ -80,7 +80,7 @@ impl MyClass {
          obj.init(|token| {
              MyClass {
                  num: 10,
-                 debug: False,
+                 debug: false,
                  token: token
              }
          })
diff --git a/guide/src/exception.md b/guide/src/exception.md
index a3079555..a41408ef 100644
--- a/guide/src/exception.md
+++ b/guide/src/exception.md
@@ -21,7 +21,7 @@ use pyo3::{Python, PyDict};
 py_exception!(mymodule, CustomError);
 
 fn main() {
-let gil = Python::acquire_gil();
+    let gil = Python::acquire_gil();
     let py = gil.python();
     let ctx = PyDict::new(py);
 
diff --git a/src/instance.rs b/src/instance.rs
index 0643bdcf..b1a9f394 100644
--- a/src/instance.rs
+++ b/src/instance.rs
@@ -39,7 +39,7 @@ pub trait PyObjectWithToken: Sized {
 pub trait PyNativeType: PyObjectWithToken {}
 
 
-/// Trait implements objet reference extraction from python managed pointer.
+/// Trait implements object reference extraction from python managed pointer.
 pub trait AsPyRef<T>: Sized {
 
     /// Return reference to object.