Created SC2211 (markdown)

SC2211.md

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+## This is a glob used as a command name. Was it supposed to be in ${..}, array, or is it missing quoting?
+
+### Problematic code:
+
+```sh
+for f in $(*.png); do echo "$f"; done   # Trying to loop over a glob
+array=$(*.txt)                          # Trying to assign an array
+echo "$(array[1])"                      # Trying to expand an array
+```
+
+### Correct code:
+
+```sh
+for f in *.png; do echo "$f"; done
+array=(*.txt)
+echo "${array[1]}"
+```
+
+### Rationale:
+
+You are using a glob as a command name. This is usually a mistake caused by one of the following:
+
+* Trying to use `` `*foo*` `` or `$(*foo*)` to expand a glob. 
+* Using `var=$(*.txt)` instead of `var=(*.txt)` to assign an array.
+* Using `$(..)` instead of `${..}` when expanding an array element.
+* Running a program with a name or directory that contains glob characters without escaping them.
+
+Look up and double check the syntax of what you're trying to do.
+
+### Exceptions:
+
+None. If you want to specify a command name via glob, e.g. to not hard code version in `./myprogram-*/foo`, expand to array or parameters first to allow handling the cases of 0 or 2+ matches.