diff --git a/casts.cpp b/casts.cpp
index 53796d0..b42313a 100644
--- a/casts.cpp
+++ b/casts.cpp
@@ -2,12 +2,12 @@
 #include <string>
 
 class mybase {
-  protected:
-    std::string ids;
+ protected:
+  std::string ids;
 
-  public:
-    mybase(std::string ids)
-      : ids(ids) {}
+ public:
+  mybase(std::string ids)
+    : ids(ids) {}
 
   virtual void foo() {
     std::cout << "i'm a mybase! ids: " << ids << std::endl;
@@ -15,7 +15,7 @@ class mybase {
 };
 
 class myclass : public mybase {
-  public:
+ public:
   myclass(std::string ids)
     : mybase(ids) {}
 
diff --git a/classes.cpp b/classes.cpp
index f59a23c..71c2a32 100644
--- a/classes.cpp
+++ b/classes.cpp
@@ -2,39 +2,39 @@
 #include <vector>
 
 class Animal {
-  public:
-    Animal() {
-      std::cout << "constructor" << std::endl;
-    }
-    Animal(const Animal& other) {
-      std::cout << "copy constructor (" << &other << ")" << std::endl;
-    }
-
-    // Note: using *virtual* does the difference here!
-    virtual void makeSound() const {
-      std::cout << "<generic animal sound> from " << this << std::endl;
-    }
-
-    Animal& operator= (Animal &a) {
-      std::cout << "lol, operator= of " << this;
-      std::cout << "(arg: " << &a << ")" << std::endl;
-
-      return *this;
-    }
+ public:
+  Animal() {
+    std::cout << "constructor" << std::endl;
+  }
+  Animal(const Animal& other) {
+    std::cout << "copy constructor (" << &other << ")" << std::endl;
+  }
+
+  // Note: using *virtual* does the difference here!
+  virtual void makeSound() const {
+    std::cout << "<generic animal sound> from " << this << std::endl;
+  }
+
+  Animal& operator= (Animal &a) {
+    std::cout << "lol, operator= of " << this;
+    std::cout << "(arg: " << &a << ")" << std::endl;
+
+    return *this;
+  }
 };
 
 class Cow : public Animal {
-  public:
-    void makeSound() const {
-      std::cout << "Mooh. from " << this << std::endl;
-    }
+ public:
+  void makeSound() const {
+    std::cout << "Mooh. from " << this << std::endl;
+  }
 };
 
 class Cat : public Animal {
-  public:
-    void makeSound() const {
-      std::cout << "Meow? from " << this << std::endl;
-    }
+ public:
+  void makeSound() const {
+    std::cout << "Meow? from " << this << std::endl;
+  }
 };
 
 void call(Animal a) {
diff --git a/poly.cpp b/poly.cpp
index 1dfaf1e..320658c 100644
--- a/poly.cpp
+++ b/poly.cpp
@@ -3,11 +3,11 @@
 
 /* abstract */
 class Animal {
-  public:
-    // virtual std::string talk() = 0; /* pure virtual */
-    virtual std::string talk() { /* or an implementation */
-      return "<sound>";
-    }
+ public:
+  // virtual std::string talk() = 0; /* pure virtual */
+  virtual std::string talk() { /* or an implementation */
+    return "<sound>";
+  }
 };
 
 class Cat : public Animal {