basicdoc: some fixes

assets/disk0/home/basic/sqrt2.bas

@@ -0,0 +1,10 @@
+1 REM Calculates a square root using newtonian method
+10 INPUT X
+11 IF TYPEOF(X)=="num" THEN GOTO 20
+12 PRINT "Please type in a number, please";
+13 GOTO 10
+20 Y = 0.5 * X
+30 Z = Y
+40 Y = Y-(((Y^2)-X)/(2*Y))
+50 IF NOT(Z==Y) THEN GOTO 30
+100 PRINT "Square root of ";X;" is approximately ";Y