Created SC1082 (markdown)

SC1082.md

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+##  This file has a UTF-8 BOM. Remove it with: LC_CTYPE=C sed '1s/^...//' < yourscript .
+
+### Problematic code:
+
+This is an encoding error that can't be seen in the script itself, but `cat -v` will show three bytes of garbage at the start of the file:
+
+```
+$ cat -v file
+M-oM-;M-?#!/bin/bash
+echo "hello world"
+```
+
+### Correct code:
+
+The code is correct when this garbage does not appear.
+
+### Rationale:
+
+Some editors may save a file with a [Byte Order Mark](https://en.wikipedia.org/wiki/Byte_order_mark) to mark the file as UTF-8. Shells do not understand this and will give errors on the first line:
+
+```
+$ bash myscript
+myscript: line 1: #!/bin/sh: No such file or directory
+
+$ dash myscript
+myscript: 1: myscript: #!/bin/sh: not found
+```
+
+To fix it, remove the byte order mark. One way of doing this is `LC_CTYPE=C sed '1s/^...//' < yourscript`. Verify that it's not there with `cat -v`. 
+
+### Exceptions:
+
+None