README.md in rubabel-0.2.1 vs README.md in rubabel-0.2.2

@@ -118,11 +118,11 @@
 Have some bonds to break?, split makes new molecules split from that bond(s)
     
     bonds = mol.matches("CO").map {|c, o| c.get_bond(o) }
     mol.split(*bonds)  # splits between every carbon single bonded to oxygen
 
-### Add & Delete atoms/bonds
+### Add, delete, modify atoms/bonds
 
 #### Adding
 
     mol = Rubabel["OCC"]
     # adds a carbon, then an oxygen to last indexed atom by atomic number
@@ -144,9 +144,19 @@
     mol.delete(mol[0])  # -> #<Mol CO>
 
     # delete a bond:
     bond = mol[0].get_bond(mol[1])
     mol.delete(bond)  # ->  #<Mol C.O>
+
+#### Modifying
+
+Can add or subtract from bonds to change bond order:
+
+    mol = Rubabel["CC"]
+    mol[0].get_bond(mol[1]) + 1   # now it is a double bond
+    bond = mol[0].bonds.first
+    bond - 1 
+    bond.bond_order   # => 1
 
 ## Installing
 
 First, many thanks to Andreas Maunz for packaging openbabel as a gem which makes this install quite painless.