Created SC1007 (markdown)

SC1007.md

@@ -0,0 +1,28 @@
+# Remove space after = if trying to assign a value (or for empty string, use var='' ... ).
+
+### Problematic code:
+
+    # I want programs to show text in dutch!
+    LANGUAGE= nl
+
+    # I want to run the nl command with English error messages!
+    LANGUAGE= nl
+
+### Correct code:
+
+    # I want programs to show text in dutch!
+    LANGUAGE=nl
+
+    # I want to run the nl command with English error messages!
+    LANGUAGE='' nl
+
+### Rationale:
+
+It's easy to think that `LANGUAGE= nl` would assign `"nl"` to the variable `LANGUAGE`. It doesn't.
+
+Instead, it runs `nl` (the "number lines" command) and sets `LANGUAGE` to an empty string in its environment.
+
+Since trying to assign values this way is a common mistake, ShellCheck warns about it and asks you to be explicit when assigning empty strings (except for `IFS`, due to the common `IFS= read ..` idiom). 
+
+### Contraindications
+If you're familiar with this behavior and feel that the explicit version is unnecessary, you can ignore the message. ``alias shellcheck=`shellcheck -e SC1007` ``