I'm not sure exactly how it's intended to work, but if you append a '\' to the end of a single-line comment the next line appears to be a comment (i.e., it is colored green), but it isn't actually made into one.
import function my_func(); // does some stuff\
this line is green but it's not actually commented
If there's anything AFTER the '\' then the non-comment line appears in normal colors, it only happens if the '\' is at the very end.
AGS syntax is based on the C programming language, in which you can extend a line to the next one by appending a backslash (which is mainly used for string concatenation and easier display of oneliners). It seems the syntax highlighter uses this part of C but the AGS interpreter does not.
Well, CJ used a third party library (http://www.scintilla.org) for the text editor part, so settings in it probably follow some standards (like C for example) by default.
That's understandable...but if possible it would be nice if something could be done to change this behaviour (whether the non-comment line could be forced to appear in normal colors or it could be made into a comment).
It looks like this is an issue with the third-party component, and to be honest it's so minor that I'm not going to spend any time investigating it myself. If anyone else feels like looking through the Scintilla source code to work out what's causing this, it'd be appreciated.