Merge pull request #601 from AaronBallman/label

[stmt.label] Format "identifier label" as a definition.

Author: zygoloid

source/statements.tex

@@ -39,7 +39,8 @@
     attribute-specifier-seq\opt{} \terminal{default :} statement
 \end{bnf}
 
-The optional \grammarterm{attribute-specifier-seq} appertains to the label. An identifier label declares the identifier. The only use of an
+The optional \grammarterm{attribute-specifier-seq} appertains to the label. An
+\defn{identifier label} declares the identifier. The only use of an
 identifier label is as the target of a
 \indextext{statement!\idxcode{goto}}%
 \tcode{goto}.