Update exercises after student feedback

exercises.py

@@ -46,14 +46,14 @@ exercise.code = "weight = {}  #TODO: Initialise weight with correct values\navai
 exercise.tests = [Test("Weight calculation", "Overall weight: 310\n")]
 exercise.checks = [Check("You should use a for loop to loop over all keys in one of the dictionaries", "for "),
   Check("You should calculate the value", "310", True),
-  Check("You need to specify the correct weights in a dictionary", "\"pencil\":(\\s)+10"),
-  Check("You need to specify the correct weights in a dictionary", "\"pen\":(\\s)+20"),
-  Check("You need to specify the correct weights in a dictionary", "\"paper\":(\\s)+4"),
-  Check("You need to specify the correct weights in a dictionary", "\"eraser\":(\\s)+80"),
-  Check("You need to specify the correct availability in a dictionary", "\"pen\":(\\s)+3"),
-  Check("You need to specify the correct availability in a dictionary", "\"pencil\":(\\s)+5"),
-  Check("You need to specify the correct availability in a dictionary", "\"eraser\":(\\s)+2"),
-  Check("You need to specify the correct availability in a dictionary", "\"paper\":(\\s)+10")]
+  Check("You need to specify the correct weights in a dictionary", "[\"']pencil[\"']:(\\s)+10"),
+  Check("You need to specify the correct weights in a dictionary", "[\"']pen[\"']:(\\s)+20"),
+  Check("You need to specify the correct weights in a dictionary", "[\"']paper[\"']:(\\s)+4"),
+  Check("You need to specify the correct weights in a dictionary", "[\"']eraser[\"']:(\\s)+80"),
+  Check("You need to specify the correct availability in a dictionary", "[\"']pen[\"']:(\\s)+3"),
+  Check("You need to specify the correct availability in a dictionary", "[\"']pencil[\"']:(\\s)+5"),
+  Check("You need to specify the correct availability in a dictionary", "[\"']eraser[\"']:(\\s)+2"),
+  Check("You need to specify the correct availability in a dictionary", "[\"']paper[\"']:(\\s)+10")]
 exercises.append(exercise)
 
 # Exercise 5
@@ -76,7 +76,7 @@ exercise.tests = [Test("a", "Enter a word/phrase to check: a\na is a palindrome\
   Test("racecar", "Enter a word/phrase to check: racecar\nracecar is a palindrome\n", "racecar"),
   Test("Anna", "Enter a word/phrase to check: Anna\nAnna is not a palindrome\n", "Anna")]
 exercise.checks = [Check("You should use len to check the length of the string", "len\\("),
-  Check("You need to make a recursive call to is_palindrome", "return(\\s)+is_palindrome\\("),
+  Check("You need to make a recursive call to is_palindrome", "return(\\s)+(.)*is_palindrome\\("),
   Check("You need a base case in your recursive function", "return(\\s)+[^i][^s]")]
 exercises.append(exercise)