vim - What does this symbol mean (similiar to ^@) in the context of text editing? -

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Unfortunately, I can not post any picture due to lack of my reputation but it looks like "^ @" .

For some context, I have a script that goes through the list of names to generate configuration files. I run an executable with those configurations and if it does not run, the script will proceed to the next name and erase the contents of the previous configuration. However, if execution runs, then the script runs on the next name and will be attached to the existing configuration. The problem is that when the first repetition is erased, it leaves behind a symbol that will fight with subsequent iterations. What does this symbol mean? much appreciated.

This does not look like "^ @", it is " ^ @ ". ^ represents a control character; For example, by typing ^ X control X control - @ , blank characters on more keyboards can be entered.

See a table of ASCII code Control key, in many cases, modifies a character by subtracting 64 from its ASCII value; Thus control-g characters (71 - 64) or 7, ASCII BEL character.

As a special case, ASCII DEL character, 127, "^?" , And can be entered by typing NUL character control-space (on most keyboards) (Vim NUL to represent the character "^ "Because it would be difficult to read.)

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