README-en.md edited online with Bitbucket

README-en.md

@@ -213,7 +213,7 @@ In this exercise, you will modify the code for the `cypher` function from Exerci
     | ciphered text   | H | Y | @ | X | K | * | T |   | K | 8 | A | Z |
 
 
-    **Figure 7.** Example Vigenere cypher of the cleartext `“PR@GR*M T8IS”` using the keyword `SHORT”`. 
+    **Figure 7.** Example Vigenere cypher of the cleartext `“PR@GR*M T8IS”` using the keyword `"SHORT”`. 
 
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