     { { $snippet "\\p{cntrl}" } "Control character" }
     { { $snippet "\\p{space}" } "Whitespace" }
     { { $snippet "\\p{xdigit}" } "Hexadecimal digit" }
-    { { $snippet "\\p{Nd}" } "Character in Unicode category Nd" } 
-    { { $snippet "\\p{Z}" } "Character in Unicode category beginning with Z" } 
+    { { $snippet "\\p{Nd}" } "Character in Unicode category Nd" }
+    { { $snippet "\\p{Z}" } "Character in Unicode category beginning with Z" }
     { { $snippet "\\p{script=Cham}" } "Character in the Cham writing system" } }
 { $heading "Character class operations" }
 "Character classes can be composed using four binary operations: " { $snippet "|| && ~~ --" } ". These do the operations union, intersection, symmetric difference and difference, respectively. For example, characters which are lower-case but not Latin script could be matched as " { $snippet "[\\p{lower}--\\p{script=latin}]" } ". These operations are right-associative, and " { $snippet "^" } " binds tighter than them. There is no syntax for grouping."

    { { $snippet "a{n,}" } "At least n occurrences of a" }
    { { $snippet "a{,m}" } "At most m occurrences of a" }
    { { $snippet "a{n,m}" } "Between n and m occurrences of a" } }
"All of these quantifiers are " { $emphasis "greedy" } ", meaning that they take as many repetitions as possible within the larger regular expression. Reluctant and posessive quantifiers are not yet supported."
{ $heading "Lookaround" }
"Operators are provided to look ahead and behind the current point in the regular expression. These can be used in any context, but they're the most useful at the beginning or end of a regular expression."
{ $table

"Most of the time, regular expressions are literals and the parsing word should be used, to construct them at parse time. This ensures that they are only compiled once, and gives parse time syntax checking."
{ $subsections POSTPONE: R/ }
"Sometimes, regular expressions need to be constructed at run time instead; for example, in a text editor, the user might input a regular expression to search for in a document."
{ $subsections <regexp> <optioned-regexp> }
"Another approach is to use " { $vocab-link "regexp.combinators" } "." ;

ARTICLE: { "regexp" "syntax" } "Regular expression syntax"
