Tidy up local tests

Author: palfrey

src/rockstar.peg

@@ -140,7 +140,7 @@ letter = { uppercase_letter | lowercase_letter}
 
 common_variable = @{common_prefix ~ WHITESPACE ~ letter+}
 
-is = {"\'s" | "=''" | ^"'s " | ^"is " | ^"was " | ^"are " | ^"were "}
+is = { "=''" | ^"'s " | ^"is " | ^"was " | ^"are " | ^"were "}
 
 target = { ^"into" ~ assignable }
 

tests/local/fibonacci.rock

@@ -21,7 +21,7 @@ Put Absolute taking a war into After
 If Before is smaller than After
 Give back the fighters of The Sign taking a war
 
-If the fighters's as strong as Before
+If the fighters is as strong as Before
 Put the fighters without After into the new
 Give back What Remains taking the new, a war