add the theta variable name

doc/tokens.txt

@@ -38,7 +38,7 @@ Hexadecimal     Description               Feature    BitcodeLexer    TextLexer
 48              x                         Yes        Yes             Yes
 49              y                         Yes        Yes             Yes
 4A              Pré-Rép                   -          -               -
-4C              θ                         Yes        -               -
+4C              θ                         Yes        Yes             Yes
 60              (                         Yes        Yes             Yes
 68              Abs(                      Yes        Yes             -
 69              Rnd(                      Yes        Yes             -

fx92/lexer.py

@@ -232,6 +232,8 @@ class BitcodeLexer(LexerBase):
             return Token(T.VAR, "x")
         if code == 0x49:
             return Token(T.VAR, "y")
+        if code == 0x4C:
+            return Token(T.VAR, "theta")
 
         # Functions
         fun = {
@@ -423,6 +425,11 @@ class TextLexer(LexerBase):
             self.code = c[1:]
             self.pending_param = True
             return Token(T.VAR, c[0])
+        m = re.match(r"theta\b", c)
+        if m is not None:
+            self.code = c[len(m[0]):]
+            self.pending_param = True
+            return Token(T.VAR, "theta")
 
         # Comments
         if c[0] == "#":

tests/autovars.out

@@ -0,0 +1,4 @@
+10.0
+0.0
+90.0
+160.0

tests/autovars.txt

@@ -0,0 +1,9 @@
+forward 10
+print x
+print y
+
+orient 90
+print theta
+
+rotate 70
+print theta