ISSUE: patterns of the kind *keyword are unduly (partially) colored
EXAMPLES:
let mate 
let colored
let myword
let my-neighbors
to update-color

ISSUE: "Less than" is converted into < (and everything after ; is colored like a comment)
EXAMPLE:
if (random-float 1 < prob-revision) [update-strategy]

ISSUE: Same as above, but with "More than" (>), "More than or equal to" (>=), and "Less than or equal to" (<=)
EXAMPLE:
if ([payoff] of target) > payoff [

ISSUE: ifelse-value not colored properly

ISSUE: patch-set not colored properly

ISSUE: turtle-set not colored properly