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2 changes: 1 addition & 1 deletion core/text-files.md
Original file line number Diff line number Diff line change
Expand Up @@ -21,7 +21,7 @@ A text file is any file containing only readable characters.
<a href="http://www.flickr.com/photos/mwichary/2355783479/" title="IBM 1403 printout (from the power-of-two program) by Marcin Wichary, on Flickr"><img class="text-left" src="http://farm3.staticflickr.com/2087/2355783479_ba8837ac18_q.jpg" width="150" height="150" alt="IBM 1403 printout (from the power-of-two program)"></a>
</div>

A character can be a number like 3 or 6, or a letter of the alphabet like M or p. Taken together, programmers call numbers and letters the the set of *alphanumeric* characters.
A character can be a number like 3 or 6, or a letter of the alphabet like M or p. Taken together, programmers call numbers and letters the set of *alphanumeric* characters.

Characters also include non-alphanumeric symbols like # or $, or even more exotic symbols like 汉 or Й. Each of these is a single character

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