Fix many typos in book chapters

Book/chapter2/examples/binform.cc

@@ -37,11 +37,14 @@ void showbits(float var)
 
 void showbits(auto var)
 {
-    std::cout << "bits for " << var << " with non-floating point type . " << bits(var) << "\n";
+    std::cout << "bits for " << var << " with non-floating point type : " << bits(var) << "\n";
 }
 
 int main()
 {
+    showbits(1);
+    showbits(1U - 2U);
+    showbits(-1);
     showbits(1.0);
     showbits(1.25);
     showbits(1.25F);