use character classes or or conditions
| to include the missing characters
But your regex seems wrong anyway, since there is a space in between
DB<1> $line = 'Cache::Cache(3)'
DB<2> x ($page , $section) = ( $line =~ /^((?:\w|:|-)+)(\(.*?\))?/)
0 'Cache::Cache'
1 '(3)'
DB<3> $line = 'dhcp-config(5)'
DB<4> x ($page , $section) = ( $line =~ /^([\w:-]+)(\(.*?\))?/)
0 'dhcp-config'
1 '(5)'
DB<5>
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