Changes ABS abbreviation to A.

Author: dmsc

manual.md

@@ -664,7 +664,7 @@ and the abbreviated syntax.
   per second in PAL systems. Use
   `TIMER` statement to reset to 0.
 
-- ABS(_num_) / AB.(_num_) :
+- ABS(_num_) / A.(_num_) :
   Returns the absolute value of _num_.
   Can be used with integers and
   floating point.

src/basic.syn

@@ -123,7 +123,7 @@ FP_T_EXPR: floating point constant, variable or function
         "-" FP_T_EXPR emit TOK_FP_NEG
         "+" FP_T_EXPR
         # FP Functions
-        "ABs"   FP_T_EXPR emit TOK_FP_ABS
+        "Abs"   FP_T_EXPR emit TOK_FP_ABS
         "ATn"   FP_T_EXPR emit TOK_FP_ATN
         "SGn"   FP_T_EXPR emit TOK_FP_SGN
         "EXp10" FP_T_EXPR emit TOK_FP_EXP10
@@ -203,7 +203,7 @@ T_EXPR: integer constant, variable or function
         # Variables
         emit TOK_VAR_LOAD E_VAR_WORD
         # Functions with parameters
-        "ABs"    T_EXPR emit TOK_ABS
+        "Abs"    T_EXPR emit TOK_ABS
         "SGn"    T_EXPR emit TOK_SGN
         "Peek"   T_EXPR emit TOK_PEEK
         "PAddle" emit { TOK_NUM, &PADDL0, TOK_PUSH_BYTE, 7 } RD_PORT

testsuite/tests/abbrev.bas

@@ -9,7 +9,7 @@ E = 10
 ? E.
 D = 3
 ? D.(1536) + D. 1536
-A = 1
-? ABSA
+A = -1
+? ABSA, A.A
 ABSA = 10
 ? ABSA

testsuite/tests/abbrev.chk

@@ -8,5 +8,5 @@ Start
 1         A         65
 1
 2468
-1
+1         1
 10