Returns the contents of the file from the current position up until the end of the current line.
Line Feedcharacters <pre class="plain inline">\n</pre> and will completely ignore
Carriage Returncharacters <pre class="plain inline">\r</pre>.
Open a file in read only mode, reads a line, tells where the current file pointer is at and then closes the file handle.
// Default mapcycle file for Garry's Mod.