5 files changed, 14 insertions, 14 deletions
diff --git a/chapter09/docs/09-grammar.md b/chapter09/docs/09-grammar.md
index c603f335..4c61bfd7 100644
--- a/chapter09/docs/09-grammar.md
+++ b/chapter09/docs/09-grammar.md
@@ -10,7 +10,7 @@ program
 statement
     : returnStatement
     | declStatement
-    | blockStatment 
+    | blockStatment
     | expressionStatement
     | ifStatement
     | whileStatement
@@ -26,10 +26,10 @@ whileStatement
 breakStatement
     : 'break' ';'
     ;
-    
+
 continueStatement
     : 'continue' ';'
-    ;    
+    ;
 
 ifStatement
     : 'if' '(' expression ')' statement ('else' statement)?
@@ -58,15 +58,15 @@ returnStatement
 expression
     : comparisonExpression
     ;
-    
+
 comparisonExpression
     : additiveExpression (('==' | '!='| '>'| '<'| '>='| '<=') additiveExpression)*
     ;
-    
+
 additiveExpression
-    : multiplicativeExpression (('+' | '-') multiplicativeExpression)*    
+    : multiplicativeExpression (('+' | '-') multiplicativeExpression)*
     ;
-    
+
 multiplicativeExpression
     : unaryExpression (('*' | '/') unaryExpression)*
     ;
@@ -88,11 +88,11 @@ INTEGER_LITERAL
     : [1-9][0-9]*
     | [0]
     ;
-    
+
 IDENTIFIER
     : NON_DIGIT (NON_DIGIT | DIGIT)*
     ;
-    
+
 NON_DIGIT: [a-zA-Z_];
 DEC_DIGIT: [0-9];
-```
-\ No newline at end of file
+```
diff --git a/chapter09/docs/09-graph1.gv b/chapter09/docs/09-graph1.gv
index 4f712c2d..e6d1851a 100644
--- a/chapter09/docs/09-graph1.gv
+++ b/chapter09/docs/09-graph1.gv
@@ -64,4 +64,4 @@ return x;
 	Add21 -> Con_20[taillabel=2];
 	Return24 -> If11:p1[taillabel=0 color=red];
 	Return24 -> Add21[taillabel=1];
-}
-\ No newline at end of file
+}
diff --git a/chapter09/docs/09-graph2.gv b/chapter09/docs/09-graph2.gv
index 9f921cc0..1a1f7a29 100644
--- a/chapter09/docs/09-graph2.gv
+++ b/chapter09/docs/09-graph2.gv
@@ -60,4 +60,4 @@ return x;
 	Add20 -> Con_21[taillabel=2];
 	Return24 -> If11:p1[taillabel=0 color=red];
 	Return24 -> Add20[taillabel=1];
-}
-\ No newline at end of file
+}
diff --git a/chapter09/docs/09-graph3.gv b/chapter09/docs/09-graph3.gv
index 9df55c1c..37bb1c53 100644
--- a/chapter09/docs/09-graph3.gv
+++ b/chapter09/docs/09-graph3.gv
@@ -34,4 +34,4 @@ return arg*arg-arg*arg;
 	Sub8 -> Mul7[taillabel=2];
 	Return9 -> Start2:p0[taillabel=0 color=red];
 	Return9 -> Sub8[taillabel=1];
-}
-\ No newline at end of file
+}
diff --git a/chapter09/docs/09-graph6.gv b/chapter09/docs/09-graph6.gv
index 492c320e..56dc6ada 100644
--- a/chapter09/docs/09-graph6.gv
+++ b/chapter09/docs/09-graph6.gv
@@ -57,4 +57,4 @@ return arg;
 	Return21 -> Phi_arg9[taillabel=1];
 	Add25 -> Phi_arg9[taillabel=1];
 	Add25 -> Con_24[taillabel=2];
-}
-\ No newline at end of file
+}