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@@ -178,7 +178,7 @@ is called the block's \dfn{environment}.
If a name is bound in a block, it is a local variable of that block.
If a name is bound at the module level, it is a global variable. (The
-ariables of the module code block are local and global.) If a
+variables of the module code block are local and global.) If a
variable is used in a code block but not defined there, it is a
\dfn{free variable}.