shut up my syntax highlighter about un-labeled source blocks

README.md

@@ -8,7 +8,7 @@ Currently, the language is entirely interactive -- to explore, simply run `go ru
 
 Prosper is stack-based, as mentioned, so all the standard stack semantics are present:
 
-```
+```forth
 > 1 2 3 4 + * -
 ok
 > .
@@ -17,7 +17,7 @@ ok
 
 New words can be defined using `: ;`:
 
-```
+```forth
 > : SQUARE DUP * ;
 ok
 > 10 SQUARE .
@@ -26,7 +26,7 @@ ok
 
 It has a single loop construct, `DO LOOP`:
 
-```
+```forth
 > : TOFIVE 5 0 DO I . LOOP ;
 ok
 > TOFIVE
@@ -35,7 +35,7 @@ ok
 
 Branches using `IF ELSE THEN` work:
 
-```
+```forth
 > : EMOJI 0 < IF 128201 EMIT ELSE 128200 EMIT THEN ;
 ok
 > 100 EMOJI 
@@ -46,7 +46,7 @@ ok
 
 Here's a Fibonacci implementation:
 
-```
+```forth
 > : FIB 2DUP + ;
 ok
 > : FIBN 0 1 ROT 1 DO FIB ROT DROP LOOP SWAP DROP ;
@@ -57,7 +57,7 @@ ok
 
 Propser also has a basic off-stack memory model using variables, constants, and pointers:
 
-```
+```forth
 > VARIABLE FOO
 ok
 > 10 FOO !
@@ -74,7 +74,7 @@ ok
 
 And, of course, it knows how to quit:
 
-```
+```forth
 > BYE
 bye
 ```