Fix multi-dimensional index example

README.md

@@ -160,13 +160,13 @@ Functions are defined after all constants, variables and data.  Functions can be
 
 After functions are defined, the main code for the module follows. The main code will be executed as soon as the module is loaded.  For library modules, this is a good place to do any runtime initialization, before any of the exported functions are called. The last statement in the module must be done, or else a compile error is issued.
 
-There are four basic types of data that can be manipulated: constants, variables, addresses, and functions.  Memory can only be read or written as either a byte or a word.  Bytes are unsigned 8 bit quantities, words are signed 16 bit quantities.  Everything on the evaluation stack is treated as a word.  Other than that, any value can be treated as a pointer, address, function, character, integer, etc.  There are convenience operations in PLASMA to easily manipulate addresses and expressions as pointers, arrays, structures, functions, or combinations thereof.  If a variable is declared as a byte, it can be accessed as a simple, single dimension byte array by using brackets to indicate the offset.  Any expression can calculate the indexed offset.  A word variable can be accessed as a word array in the same fashion.  In order to access expressions or constants as arrays, a type identifier has to be inserted before the brackets.  a ‘.’ character denotes a byte type, a ‘:’ character denotes a word type.  Along with brackets to calculate an indexed offset, a constant can be used after the ‘.’ or ‘:’ and will be added to the base address.  The constant can be a defined const to allow for structure style syntax.  If the offset is a known constant, using the constant offset is a much more efficient way to address the elements over an array index.  Multidimensional arrays are treated as arrays of array pointers.  Multiple brackets can follow the ‘.’ or ‘:’ type identifier, but all but the last index will be treated as a pointer to an array.
+There are four basic types of data that can be manipulated: constants, variables, addresses, and functions.  Memory can only be read or written as either a byte or a word.  Bytes are unsigned 8 bit quantities, words are signed 16 bit quantities.  Everything on the evaluation stack is treated as a word.  Other than that, any value can be treated as a pointer, address, function, character, integer, etc.  There are convenience operations in PLASMA to easily manipulate addresses and expressions as pointers, arrays, structures, functions, or combinations thereof.  If a variable is declared as a byte, it can be accessed as a simple, single dimension byte array by using brackets to indicate the offset.  Any expression can calculate the indexed offset.  A word variable can be accessed as a word array in the same fashion.  In order to access expressions or constants as arrays, a type identifier has to be inserted before the brackets.  a ‘.’ character denotes a byte type, a ‘:’ character denotes a word type.  Along with brackets to calculate an indexed offset, a constant can be used after the ‘.’ or ‘:’ and will be added to the base address.  The constant can be a defined const to allow for structure style syntax.  If the offset is a known constant, using the constant offset is a much more efficient way to address the elements over an array index.  Multidimensional arrays are treated as arrays of array pointers.
 
 ```
     word hgrscan[] = $2000,$2400,$2800,$2C00,$3000,$3400,$3800,$3C00
     word           = $2080,$2480,$2880,$2C80,$3080,$3480,$3880,$3C80
 
-    hgrscan.[yscan][xscan] = fillval
+    hgrscan.[yscan, xscan] = fillval
 ```
 
 Values can be treated as pointers by preceding them with a ‘^’ for byte pointers, ‘*’ for word pointers.