Variableize Makefile and adjust pebble tokens

Also made repl() a void function

src/Makefile

@@ -1,16 +1,17 @@
 files = pebblisp.c tokens.c object.c env.c
+exe = pebblisp
 
 all:
-	gcc -g -O0 -o pebblisp -D STANDALONE $(files) && ./tests.sh
+	gcc -g -O0 -o $(exe) -D STANDALONE $(files) && ./tests.sh
 
 notest:
-	gcc -g -O0 -o pebblisp -D STANDALONE $(files)
+	gcc -g -O0 -o $(exe) -D STANDALONE $(files)
 
 val:
-	gcc -g -O0 -o pebblisp -D STANDALONE $(files) && ./tests.sh -val
+	gcc -g -O0 -o $(exe) -D STANDALONE $(files) && ./tests.sh -val
 
 debug:
-	gcc -g -O0 -o pebblisp -D STANDALONE -D DEBUG $(files) && ./tests.sh
+	gcc -g -O0 -o $(exe) -D STANDALONE -D DEBUG $(files) && ./tests.sh
 
 run:
-	./pebblisp
+	./$(exe)

src/calc.h

@@ -48,9 +48,9 @@ char *tokens[] = {
     "7","8","9", "0",
     "a", "b", "c", "d", "e", 
     "= ", "< ", "> ", 
-    "spent", "window",
+    "spent ", "window",
     "\"",
-    "map", "fn", "def", "if", "\n",
+    "cat", "map", "fn", "def", "if", "\n",
     END_PHRASE
 };
 

src/pebblisp.c

@@ -84,7 +84,8 @@ void eval_forms(Object *destList, const Object *src, struct Environment *env)
 {
     int length = listLength(src) - 1; // Not counting first_form
     for(int i = 0; i < length; i++) { // Evaluates all in list
-        destList[i] = eval(itemAt(src, i + 1), env); // Skip the first
+        Object *ptr = itemAt(src, i + 1); // Skip the first
+        destList[i] = eval(ptr, env);
     }
 }
 
@@ -411,7 +412,7 @@ Object parseEval(const char *input, struct Environment *env)
 }
 
 #ifdef STANDALONE
-int repl(struct Environment *env)
+void repl(struct Environment *env)
 {
     char input[200] = "";
     while(input[0] != 'q') {