Merge pull request #306 from srobo/fix/zone-range

Fix range of values for `Robot.zone`

Author: raccube

programming/sr/index.md

@@ -61,7 +61,7 @@ From here in, if you see a `R.something`, the requirement of the `sr.robot3` imp
 As well as the attributes listed above, the Robot class also has the following attributes, which you may find useful:
 
 zone
-:    The number of the zone that the robot is associated with. Either `0` or `1`.
+:    The number of the zone that the robot is associated with. Between `0` and `3`.
 
 mode
 :    Either "comp" or "dev".  When in a competition match, this will be "comp", and at all other times this will be "dev".

troubleshooting/python.md

@@ -44,7 +44,7 @@ As you can see, this could often be more helpful.
 Other causes of syntax errors to look out for are:
 
 * Missing colons at the end of `def`s, `if`s, `for`s, etc.
-* Using the wrong number of `=` signs (see the [Variables](#variables) section)
+* Using the wrong number of `=` signs (see the [Variables](/docs/tutorials/python#variables) section)
 * Missing brackets (e.g. `x = 5 * (3+2`).
 * For those outside of the U.K., the decimal point is a period (`.`), not a comma (`,`)