Removed x:block markup

Replaced F94 with F12

block.tex

@@ -58,8 +58,7 @@ If the input source is a block, these restrictions also apply to
 the address returned by \word[core]{SOURCE}. Block buffers are
 uniquely assigned to blocks.
 
-\place{x:block}{See \xref{rat:block:buffers}.}
-
+See \xref{rat:block:buffers}.
 \subsection{Parsing} % 7.3.4
 
 The Block word set implements an alternative input source for the
@@ -131,8 +130,8 @@ See: \xref[3.4.4 Possible action on an ambiguous condition]{usage:ambiguous}.
 
 \section{Compliance and labeling} % 7.5
 
-\cbstart\patch{F94}
-\subsection[Forth systems]{ANS\strike{3.5}{25} Forth systems} % 7.5.1
+\cbstart\patch{F12}
+\subsection[Forth-\snapshot systems]{Forth-\snapshot\strike{-1}{25} systems} % 7.5.1
 \cbend
 
 The phrase ``Providing the Block word set'' shall be appended to
@@ -147,8 +146,8 @@ The phrase ``Providing the Block Extensions word set'' shall be
 appended to the label of any Standard System that provides all of
 the Block and Block Extensions word sets.
 
-\cbstart\patch{F94}
-\subsection[Forth programs]{ANS\strike{3.5}{25} Forth programs} % 7.5.2
+\cbstart\patch{F12}
+\subsection[Forth-\snapshot programs]{Forth-\snapshot\strike{-1}{25} programs} % 7.5.2
 \cbend
 
 The phrase ``Requiring the Block word set'' shall be appended to